Remote Subwoofer Controls

I haven’t had a subwoofer since my last one was burgled nearly 40 years ago, I recently bought a REL S/812 to pair with 32YO Dahlquist DQ-20s and new PrimaLuna EVO400 pre- and power amps. While I’m loving the remote gain control offered by PL (never had one before), I’m surprised a high-end company like REL doesn’t offer a remote for their subs. I find that I’m compelled to adjust the sub settings not infrequently, depending upon the nature of the source material and my chosen volume. I’m mystified by posters that claim they can set their sub(s) to a single setting and be content with fixed output. What am I missing?