Seen some threads on reddit of people swapping out for skr boards, found a git repo doing that for an adapter kit but does look to have things documented.

End of the day, it's just some steppers, sensors and heaters, klipper supports a bunch of different printer types (bed slinger, core xy, core xz, cartesian, polar, like seriously a lot). Hard part on some of these would more likely be connect components to the board, need to know voltages and pinout for example, but if you can figure that out you're good. Klipper is amazing and you can replicate a lot of custom stuff in macros.

GitHub - smartwareio/SWIO-Kobra-Max-Adapter-Kit: Documentation for swapping Anycubic Kobra Max mainboards and print heads.

Documentation for swapping Anycubic Kobra Max mainboards and print heads. - smartwareio/SWIO-Kobra-Max-Adapter-Kit

^GitHub

Oh for sure, I'm firmly on the side of building a kit or sourcing your own for something like a voron v0.2 for people unfamiliar/uncertain; not a huge investment, will learn a lot assembling it and you'll have an abs capable machine that's yours at the end of the day. I do still absolutely recommend prusa kits too or second hand older ones, super easy to modify and there's and absolute wealth of information (and mods) for them.

Board swaps and conversion kits more for people who already have something and would rather modify it than buying a whole new machine, less waste than tossing the whole printer and getting a new one. Could use as a platform for something like a switchwire, there's an Ender 3 conversion out there for example, and looks like there's an anycubic Viper one too and another

GitHub - Ressetkk/Vyper_SW: Anycubic Vyper to Voron Switchwire attempt

Anycubic Vyper to Voron Switchwire attempt. Contribute to Ressetkk/Vyper_SW development by creating an account on GitHub.

^GitHub

Qidi.

I've owned two and they've been very nearly completely turn-key (the OG X-Plus) and absolutely completely turn-key (my current X-Max 3). Their bigger machines are fully enclosed and have active chamber heaters to manage pain in the ass materials like ABS and ASA, and even polycarbonate.

They have their "own" slicer but it's just a mildly breathed upon fork of Prusaslicer with built in presents and which has all the plugins for remotely administering their machines already included. You can use stock Prusaslicer, Cura, or Orca with them if you prefer. The boards just run Klipper. You have terminal access, and you can hack the machine however you want if that's your jam.

Their upcoming gen 4 machines promise compatibility with an AMS-like "Qidi box" filament exchanger system, although the details of that remain unspecified at the moment. If you want multimaterial now they have a true dual extruder model also.

As of yet, there's no lockdown, no cloud bullshit (to be fair they do now have some kind of cloud bullshit platform available, but it's entirely optional and I've never touched it or even bothered to look at it), nothing proprietary, and so far there have been no rug-pulls on any of the above.

Eh. I'm sure they'll continue to pay enough influencers to gush about their products all the time to keep sales running strong well into the foreseeable future.

Remember that a significant population of people deliberately buy Apple products, among other firmly closed, enshittified, and user-hostile products/systems. The majority of consumers are sadly not educated enough to care and their money is still indeed green.