Synology runs a proprietary OS OOTB that's had multiple sloppy vulns exposing full remote access to users' files. Putting your data in the hands of fuckups who have and will continue to leak it is the opposite of total control.
It's completely trivial to store any data you want to in a cloud provider 100% securely just by piping it through openssl before uploading.
For anyone who missed it, the Windows Terminal team is infamous for claiming that it would require PhD level expertise to implement some basic optimizations suggested in a Github thread. Within a few hours, another developer countered that claim by submitting a functioning PR with said improvements implemented.
Windows Terminal team lead Dustin Howett then went on to double down on the original claim that said optimizations were unfeasable, and publicly attacked the author of the original suggestion thread on Hacker News. He issued an extremely half-assed apology and is still a Micro$haft employee to this day.
https://blog.royalsloth.eu/posts/it-takes-a-phd-to-develop-that/