I like Godot to play around with because there's no mental effort attached to "but what if I release this eventually". 99% of everything I've ever built is just quick little play projects, but taking on a commercial engine (even if the license is free) ties my brain to different concepts.

Godot just frees your mind from that side of things, and so in that case, it's a 10x experience if that long-range commercial element taxes your mind.