No, I don’t agree, not necessarily. VMs are “heavier” as in use more disk and memory but if they are mostly idling and in a small lab you probably won’t notice the difference. Now if you are running 10 services and want to put each in its own vm on a tiny server, then yea, maybe don’t do that.
In terms of cpu it’s a non-issue. Vm or docker they will still “share” cpu. I can think of cases I’d rather run proxmox and others I’d just go bare metal and run docker. Depends on what I’m running and the goal.
It looks like at one time they offered both on-device and on-cloud storage. It also looks like they went to "cloud-only" storage at some point, thus the "upgrade" path that was mentioned in your WBM link. Companies evolve and change as do their products. It looks like they started offering a lot more "collaboration" tools and likely found it easiest to manage a single version of the document in the cloud versus syncing it to everyones device (also cheaper).
Based on the tone here, I imagine you went into their discord a bit "hot" and when you heard stuff you didn't like it escalated, so it's not surprising you got yeeted. This isn't "crisis management" for them, this is dealing with an upset former customer.
Dropbox is forgiving, other cloud providers aren't. You stop paying, you are now a cyber squatter taking up disk and not paying for it. You will lose your data, it's just a matter of time. Some are on the next day of your subscription ending, others have some buffer. There should be NO expectation your data will persist after you stop paying them and your plan has run it's course. Assuming your data will still be there after you stop paying is on you, not the provider.
Not necessarily. Just because you paid for a service at one point in time, doesn't mean you get to continue using that service forever. If you "cancel contracts" daily at work, then you would know this, or maybe the contracts you are working with are very narrow in scope. It's normal for data to be dumped after you stop paying. Some providers will hold on to that data for a period in case you change your mind and make it easier to come back, but there is no expectation for stuff to continue working on SaaS after you stop making payments. Again, that's on you.