If you are already familiar with Vim bindings is Helix's object then action really worth that much?

I thought the same, but I gave Helix a shot for fun a couple years ago and never looked back. It really does feel better/more ergonomic, but the greatest benefit is that almost everything you need is built in. I spent way too much time fiddling with Vim and NeoVim configs.

For me, definitely. Plus it's quite the muscle memory switch. I switched to Kakoune ages ago, and then eventually Helix because i liked its design a bit more.