I have used unreal 4 for several years and switch to 5 in 2022 i believe.
Thing that change for me the most is Lumen, i don’t have to do Lightmap for all of my static mesh, debug for visual bug to fix lightmap, config lightmap resolution for different static mesh and no more build lighting. In a year i saved weeks/month of work to be honest.
You have to do some testing if Lumen is expensive for your expection of your game quality, adding a sunlight + 2/3 spotlight on the same scene for example on a 1650 gtx will eat some fps with TSA at 1080p. So this will also depend on your optimisation: level streaming (especially light, emissive etc…)
I have used this forum for quite a while, lot of people are getting crash on ue5 especially with metahuman, nanite, control rig. I haven’t used these 3 things since i already have made my character asset before ue5 and am just used to.
I also tend to make more backup on ue5 project especially when am adding new implementation that potentially can break things such as structure or adding anim asset.
One thing am annoy is the removal of Session Frontend from 5.3 
, so i recommend 5.2 for now 