I am currently still limping along on DSL for my business, largely because my business has only survived the pandemic thanks to being able to VPN into my office. I'd love to have a faster fiber connection, but without the fixed IP address, I'm concerned that any kludgy workaround (which relies on some third-party service) will fail me at a critical juncture.
I've asked about this before, as have many, and the answer has always been that it's not something Sonic offers or is planning to offer. The difference now is that AT&T (whose service Sonic is still reselling in my area) does offer this option, at least for business customers. (This is not vaporware: my landlord has purchased it for his own use.)
All other things being equal, I'd really rather not have a business relationship with AT&T, but at some point my DSL will either become too slow for my needs or be discontinued, and I'll have a difficult choice to make unless Sonic reconsiders.
Alternately, and forgive my naive lack of understanding of the underlying technology, it seems to me that if there exists somewhere a table linking a particular IP address with my physical equipment, it shouldn't be so hard to offer a service where [my_username].sonic.net resolves to my IP address, irrespective of dynamic changes.