[ZeroConcerns]

Depends on the type of cable assembly. If it's fiber strands inside a soft-ish plastic jacket (and most of the cable is in fact in conduit), a service loop is fine, albeit a bit pointless for most repair scenarios. For armored cables (which are significantly stiffer), you only do these loops in situations where you expect to need to replace significant sections (think 'getting hit by a falling tree' or 'particularly aggressive rodents') and you have the space.

[deno]

Both tree and rat took out my fiber so the loops are definitely useful. If your fiber goes through your whole house it's significantly less work to only have to reconnect one end instead of redoing the whole run.