I’ve had bells on all of my bikes for years. I’ve lost count of the times I’ve rung them, and peds have stopped and looked around for something they’ve dropped, looked around at me then carried on walking three or four abreast until I’ve got close up and called ‘excuse me’, at which point they’ve looked at me in a bovine fashion not quite certain what I’m doing there then shuffling sideways to let me go past, or badmouth me for having the cheek to actually ring a bell on a public right of way, or, in one instance suddenly cross in front of me as I was passing having rung my bell several times, knocking me clean off my bike. The stupid bint responsible was totally engrossed in a phone conversation, which ended abruptly when she fell over as well smashing her phone to pieces on the Tarmac.
Bells are fine, but useless when those they’re intended to alert seem determined to ignore them.