It would be nice to have an updated standard for newer buildings, though. In practice fewer and fewer fittings are using screw-in lightbulbs at all but there's not another standard.
Your comparison of USB-A to USB-C is nonsensical and does not actually acknowledge the issue of why the existing screw in bulb direct replacement have issues
Screw-in sockets are more durable and long-lasting than any replacement so-far, most of which have been replaced again (remember those weird fluorescent mini-bulb sockets?).
Well, we can certainly argue with 110 or 220 is a better voltage for a house. It is quite clear that 12 volts is too low.
And it's not like we need to just stop producing Edison socket styles tomorrow. But let's make sane standards today.
My current apartment has dedicated circuits in the living room and bedroom. But in the living room they're in awkward places.
I always had to resort to multiple lamps that would plug into an outlet so I could place them where I needed them. Running 12 V for the bulbs would require rewiring most of the apartment.
Now, I'm not against having a new socket standard. But it would have to be connected to 220 V.
Its not like your bulbs are plugging straight into your wall outlets. You've got some kind of lamp fixture that the bulbs screw in to, correct?
Your lamps would still plug into mains, same as they do today. The lamp fixture overall would contain the driver components, hopefully in packaging which lets it manage heat well and have good build quality. But whatever parts do fail routinely should be able to be easily replaced with some kind of standardized socket. It just seems like we're trying to squeeze too much too cheaply into a form factor that's ill suited for the requirements by trying to shove all the driver circuitry into the same envelope of an older Edison A-shape socket style bulb.
This has already kind of been a thing for a while with low voltage halogen lamps. The bulbs themselves aren't made for mains voltage, the lamp structures themselves give the right voltage for the halogen mini bulbs. I've replaced a few bi-pin halogen lights for LEDs with drop-in replacements (especially for outdoor lights), but this same kind of bulb packaging hasn't really been very common for interior lighting from what I've seen.
> Now, I'm not against having a new socket standard. But it would have to be connected to 220 V.
Why would it need to be 220 V in the "socket" for the bulb? Why do we need lamps themselves to just be a frame to hold a wire, why not put the driver circuitry in there to step it down to whatever voltage we decide to drive the DC LED bulbs at?
At 48VDC you could run 16AWG like 100ft and still be fine as long as the lights pull around 60W or less all together (which works out to ~12 lights on a circuit). And that circuit would only add another ~2W or so in power losses when energized.
That circuit is essentially what power over ethernet does today so you could replace romex with PoE Type 3/Type 4 plenum rated ethernet and it'd be like half the cost.
And if you really want to optimise for losses you could put the switches on the ethernet data line and use that for sensing rather than running the PoE circuit out to each light switch (and then de-energise the PoE circuit when the switches report off). Bonus points in that this would allow you to "reprogram" which light switch controls which circuit without needing to do any re-wiring.
And again, your whatever voltage, 48 volts, is way too much for an LED, so we still have a power supply. What's the difference between a power supply running on 48 volts DC versus 110 or 220 volts AC? Ultimately, there's not much of a difference, well, you could do a very cheap linear regulator and be horribly wasteful of power, but more likely you're going to be doing a social power supply, which is going to be more complex and have similar efficiency losses. I'm not enough of an electrical engineer to know this for sure but I would suspect the power supply in your Ethernet switch and then the second one to get to that your voltage is less efficient than just having a single power supply that goes from regular line voltage to whatever the LEDs need.
Mounting options that allow larger LED lights allow you to use lights that are more thermally efficient without sacrificing any replaceability. JIS C 8310 mounts for example.