I'd either need Bitwarden to take some money or be fully open source and I have to provide the cloud storage. Being "free" but still clearly costing them real operational money (even if not much) is not something I will plan on being there in 5 years.

I don't necessarily need LastPass to be there in 5 years, since I can export and recover what I need into another manager if I need to, but I personally don't want to go into something that is set up right now to not be there in 5 years.

This is not a permanent objection forever and ever, amen. If my objections go out of date, I'd consider at least trying it.