Voice was a mainstay for me for a long time. The closest replacement I could find was a service called OpenPhone[1]. It's designed as a VoIP service for small business teams, but I'm finding it works great as a solo voice/text option. I was able to port the Voice number over.
I actually don't even use a lot of the features of Voice. I mostly just like having my phone number decoupled from any carrier or handset, so changing them is seamless, or they aren't even necessary. I do a lot of my phone calls and SMS/MMS messaging from the web application on my laptop.
[1] https://www.openphone.com/