I like the engine but I don't think it is super competitive in 3d. For example, to use it on Quest you have to use GLES2, which is missing a number of features. Quest 2 is a mobile GPU, so you aren't going to be state of the art but I have seen more games that seem to squeeze more performance out using Unreal on that platform. Hopefully the switch to Vulkan will help them get better 3d performance on mobile gpus.
There are a ton of changes in the works from Godot 3. to 4. One of the biggest problems with Unity, in my experience is compatibility as the engine moves forward in versions. You always see projects that are stuck on older versions of Unity because the team doesn't have the time to make the changes so it works with the new version. In general I haven't seen that as a big issue for Godot. Code for old versions seems to run on new versions. But I have never seen a jump as big as the one to 4.0. The question I am wondering is will they be able to make that many changes to the engine and have it be reasonable to transition projects.
There are a ton of changes in the works from Godot 3. to 4. One of the biggest problems with Unity, in my experience is compatibility as the engine moves forward in versions. You always see projects that are stuck on older versions of Unity because the team doesn't have the time to make the changes so it works with the new version. In general I haven't seen that as a big issue for Godot. Code for old versions seems to run on new versions. But I have never seen a jump as big as the one to 4.0. The question I am wondering is will they be able to make that many changes to the engine and have it be reasonable to transition projects.