They're 2230 SSDs. It's fine. People have been using this model fine for months. I don't know why people are suddenly so skeptical about replacing parts when that was one of the points of using standard interfaces in a portable PC like this.
You say that this model has been used fine for months, can you clarify if you're talking about the specific 2TB SSD which framework is selling or 2230 SSDs in general?
My primary concern would be making the fragile and unreliable WiFi chip in the deck even more fragile and unreliable.
"Just turn off modern but now industry-standard security" is almost never the right answer.
More background:
"By far, the biggest leap forward in WiFi security from WPA2 to WPA3 is seen on the Personal class of networks that use passphrases."
https://securityuncorked.com/2022/08/wifi-security-wpa2-vs-w...
Or more of a summary: https://themescene.tv/blog/wpa2-vs-wpa3/
Of course, turning it off at network level depends whether you care, but preferably leave it on for your devices.
Finally, generally good advice for how your WiFi network should be configured:
Unfortunately if it is this is not something the user can fix like simply managing the firewall properly so you may choose to disable it for now in that case. That's fine, particularly for home WPA2 PSK networks where the only risks mitigated are someone DDOSing you off the Wi-Fi (which they can do without management frames via interference anyways) and someone getting your passkey and then decrypting past recorded traffic (future traffic is still a risk even with SAE, they can spoof being your SAE SSID and if your client connects to it you're sending all your data to your attacker, just extra securely now). In the future there may be other problems discovered with WPA2 but it's by no means considered insecure yet.
Anothing thing to try for 5 GHz issues (again, not to be taken as "do this everywhere all the time and just leave it that way regardless if it helps") is try non-DFS channels. They may normally be more open but devices sometimes still have problems with them and the regulatory requirements around what happens when there is interference in certain areas.
Could it be because Valve said they were very careful in choosing their ssd in terms of power draw and wifi interference?
You're likelier to generate interference to radio performance from the display mode or USB devices, and ensuring datarates from common internal storage won't interfere is part of that.
one can presume that a device capable of using 2.5x the wattage in an already ultra-confined area is going to face some heat dissipation issues at the very least
You want a Samsung PM991a, a Sabrent Rocket SB-2130-1TB, or a Kioxia BG4, to keep the draw as close to 1 amp as possible. Or slay your battery and bake your internals. It's your hardware, do what you want.
Sure you can swap in a new NVMe module or SO-DIMM into a given device, and while it may still function, you may now have worse performance and/or worse battery life.
Despite having the same physical interface, each NVMe module has different electrical specifications.