I never liked to play DS games on 3DS because of the blurry screen: DS games run at a 256x192 resolution while the 3DS screens stretch that out to 320x240. Non integer factor scaling at such low resolutions is incredibly noticeable.
DSi (and XL) similarly can be softmodded with nothing but an SD card, though using a DS Lite instead with a flashcart can enable GBA-Slot features in certain DS games including Pokemon.
If you’re planning to subscribe to Proton Unlimited or Proton Family regardless, you might as well try Proton Drive. They try to be fairly privacy focused similar to Proton’s other products.
Mega has a similar privacy-oriented design. Such that the server side shouldn’t have direct access to your unencrypted file data or its decryption keys.
Still, any web-based service necessitates trusting the JavaScript you receive not to leak out your password or keys. Both Proton and Mega have a good track record so far in that regard, but the best practice for privacy with raw data storage is to encrypt your own data with local tools and treat any remote server as untrusted.
I would not count on all major distros maintaining support for processors as old as Core 2 forever.
RHEL 9 in particular (and by extension CentOS Steam, Alma, Rocky) already dropped support for all of the processors affected by this breakage since 2022.
Linux systems often group these CPU feature set generations into levels, where “x86-64-v2” requires SSE4 and POPCNT (Nehalem/2008 and newer) and “x86-64-v3” requires AVX2 (Haswell/2013 and newer).
Ubuntu and Fedora are already evaluating optimized package builds for both v2 and v3 but haven’t announced any plans to drop baseline x86-64 yet; I wouldn’t be surprised to see it happen within the next two years. Debian is a relatively safer bet for old hardware.
I use it for just two features: video screenshots and increasing playback speed higher than 2x. Both seem like small features but I very quickly notice their absence when I try to use a browser that I haven’t yet installed it in.
If you’re assuming “as long as the hardware will function” in the first place: even digital copies, DLC, and updates installed on the system before the servers shutdown will continue working even without hacks. There’s no check-in requirement except for the subscription-locked things like SNES games.
However, the result of a nonrepairable hardware failure when you have no hacks nor official servers is rather bad no matter how your games are obtained: OFW does not allow you to transfer save data from one system to another without going through Nintendo servers and a vast majority of cartridge games are incomplete without updates or DLC.