I suppose Fibre trumps all as fibre is a stable and fixed connection unlike 5G which is still mobile and will fluctuate when the wind blows a little harder than usual
That is honestly the best option , people that have access to fibre and are on LTE/5G , should rather switch it is way less stress for a little extra buck.
once fibre was activated in my area I cancelled immediately and moved over , can happily say I have never looked back since.
Fibre is the best way to go , 100% reliable/stable unlike these "mobile" connections that switches towers and disconnects from one tower to throw you onto another tower.
You will not regret the move to fibre.