I can highly recommend Owlbear 2.0. I have used foundry for a full campaign, but it is exactly the kind of trap that previous posts have described. Great for first party, not great for homebrew and 3PP. A LOT of work. Owlbear 2.0 just rearranges where you can find some things and includes an addon system for a dice roller, initiative tracker etc. so you can use it pretty bare bones. I use the dice roller for players who want to use it or have them use physical dice. The tokens that can be moved by any player and the easier workflow with maps makes it a lot easier to just switch back and forth between gridded combat, zone based combat or theater of the mind without any hickups. I am not going back to foundry, I just don't have the time and players controlling the fog revelation really messed with creating and atmosphere and description before they would see the contents of a room on a map.My particular issue is about automation being very good for WotC stuff and generally terrible for most 3PP content. This creates a tension between those sources for some players when using Fantasy Grounds, which is the platform I use as my primary VTT.
I should look into simpler platforms but it seems like everyone is trying to implement more utility. As I understand it, Owlbear Rodeo was super simple but 2.0 has started to chase Foundry.