Personally, and each to their own, but I thought the 5 was a very underwhelming upgrade over my 2XL. Certainly better on paper but in the real world the devices were so similar as to be barely noticeable as an upgrade. In fact the most welcome change for me was wireless charging. The screen itself was a bit of a downgrade at least as far as size concerned, and I was led to believe the difference in quality was like a yawning chasm, but in fact I thought in most respects the 2XL screen was just as pleasing to the eye despite the negativity, with the 90hz making a small difference and the brightness was better. The battery life is good however but in these lockdown times, not really a massive deal.
For me it was not really a satisfying upgrade from my 2xl so from a 3XL or 4XL definitely not worth the bother. In fact that was part of the reason I ended up going for the s21 ultra, which does at least feel like a substantial upgrade.