I just started using Teams (and “New” Oiutlook) at work (instead of Slack) and both are truly abysmal pieces of software.

I'm actually on apples side for this

If you are willing to go to approx $200, then as mentioned in your other thread I think a refurbished Pixel 8 will be a great deal that will last you for years. I recently recommended that to someone at work, he was on a strict £200 budget, which got him an excellent conditioned refurbished Pixel 8 here. He's since told me its the best phone he's ever had and feels its a massive upgrade over his old Samsung A series device. I don't know the sites which deal in refurbished devices in the US, however I’m sure you will have some options like we do here. Failing that Ebay is also quite good in my experience. If you wanted something a bit cheaper, then you could maybe go for an older Pixel 7, these will still get security updates until the end of 2027. Even after that you have good third party OS support from LineageOS. It doesn't have to be a Pixel though, you can buy many older devices for a good deal that would be better than a new $100 phone and flash LineageOS to them: https://wiki.lineageos.org/devices/

I don't use one drive, but then I don't use any cloud storage, not even Icloud on my mac. If I did use cloud storage, then I would not use One drive, not because there is anything wrong with it, but because I can use Icloud. The only reason I see to use one drive is if your job requires you to have access to it

Not built in, which is not a bad thing. There are ways of adding cloud storage to it, Dropbox is the most well know that also have a client for Linux, but there are others.