10.9 my personal “Snow Leopard”. It has most of what made the Aqua era releases good with some QoL/polish improvements. If I could patch it with non-flat scrollbars and 10.5/10.6 2D grid spaces it’d be perfect.
You’ve definitely hit on the core of the issue with the Snow Leopard myth, though: comparing the final battle-hardened bug-patched version of an OS, to a newly released version. Seems like “Snow Leopard” always gets trotted out whenever someone is unhappy with the latest release.
Upon release it was a security/stability CF. Today there are retrocomputing forums dedicated primarily to it. What they are gazing rose-coloredly back on is likely Windows XP SP3, not how the OS was upon its release.
Windows XP was sufficiently reliable by SP1, sufficiently secure by SP2, and sufficiently prepared for an extended lifespan by SP3.
People had bad experiences on Vista because they tried to run Windows Aero on 2001 hardware, and hardware vendors for once strong-armed MS into certifying their half-decade-old hardware as 'ready for Vista'.
Windows XP was when they started putting the activation bullshit in, which was just a little too much for privacy-brained me. I had migrated to Linux pretty much exclusively by then.