1) I doubt this is Microsoft conspiring against a LibreOffice dev. It's not impossible, but it seems way more likely that it's just an automated process that is misfiring.
2) I cannot prove that this (opaque) process has been retrofitted to use LLM's in its decision making, but I would not be the slightest bit surprised. Neural networks are, intrinsically, even more opaque than the processes they replace.
3) Using Big Tech as a place to backup your work/files/etc. is fine, as long as you have a local copy, and sometimes you have no choice but to deal with them. However, any time you're dealing with Big Tech, even if they have no particular animus towards you, they may suddenly be unavailable (to you) without explanation, for an extended period of time. Plan (as best you can) accordingly.
2) I cannot prove that this (opaque) process has been retrofitted to use LLM's in its decision making, but I would not be the slightest bit surprised. Neural networks are, intrinsically, even more opaque than the processes they replace.
3) Using Big Tech as a place to backup your work/files/etc. is fine, as long as you have a local copy, and sometimes you have no choice but to deal with them. However, any time you're dealing with Big Tech, even if they have no particular animus towards you, they may suddenly be unavailable (to you) without explanation, for an extended period of time. Plan (as best you can) accordingly.