I know from experience. I ditched my cast iron 25 years ago and never looked back.
I had a similar path. I owned one cast iron pan that I used mainly to sear meat, do some breakfast things like potatoes, and make grilled cheese sandwiches, but when I got a really good stainless steel skillet I found it seared well too so I started reaching for the cast iron pan less and less, eventually it ended up in the garage and I haven't missed it. I come across people all the time who tell me that cast iron is essential, yet they can never give me a good reason other than claims I need it to sear that I know are false. That is how I end up with hilarious exchanges like:
Ave: Cast iron doesn't heat evenly
HWGA: Mine does, look at this bread I baked in the oven!
Ave: Here is an IR picture of how uneven it is on a burner after 30 minutes
HWGA: Well my cast iron is the exception, it heats evenly
Ave: No, it isn't. Physics and all.
HWGA: You think cast iron sucks but many chefs use it.
Ave: I never said it sucks, I just pointed out a disadvantage of it.
HWGA: Le Creuset is cast iron, I bet you didn't know that!
Ave: No, Le Creuset is a brand that makes both cast iron and stainless steel cookware.
HWGA: Have you ever won a cooking competition?
Ave: No. That doesn't change the inherent properties of cast iron.
HWGA: I retired at 46!
Ave: That doesn't make cast iron heat evenly
HWGA: My IQ is so high I worked on the F-22!