How likely am I to brick the fairphone 4 if I buy one?

Thinking about buying the fairphone 4. Coming from oneplus 8, which is almost unbrickable, thanks to an EDL MSM tool.

Obviously, I'd be careful. But am I likely to brick a fp4 by ROM hopping? Is it dangerous enough that I should not go into buying this phone with the intention of installing a ROM?

Mainly, I want to play with Ubuntu Touch, PostmarketOS, and maybe sailfish. But I figure if those don't quite work out, I'll land on Lineage with MicroG or /e/, since that'll be stock fp4 in the US.