Do you guys wear collars on your indoor cats?

I used to let my girl wear a collar 6 years ago when I first gotten her fearing I would lose her when I’m at work, and especially as a stupid first time cat owner, I got her collars WITH bells and let her wore practically years before I moved into a better place which I felt more safe and I stopped letting her wear any collars. Fast forward to now, I have gotten 3 more new additions recently so I’m a 4 cat owner now and I’m going on a trip soon. I took off all their bells on their collars and made sure it’s breakaway ones. I’ve been letting them wear for a few days now so that they will be accustomed to it but I often wonder if they are uncomfortable with it.

By the way, the reason why I didn’t feel the same way as I did now a few years ago is that I have an elderly at home whom always open the door wide sometimes..

Edit: They’re all microchipped and they’re just DSH tabby cats with no particular breeds so they could’ve been mistaken as a stray if I don’t put collar. And who will be so kind to pick my cat up and scan for microchip at the vet? Lol. The collar they wear has my number on it.