Yep - no major problem. Doesn't need to be in lock-step with TC.
Just noticed that on the RC of Focal64 that busybox | head reveals version 1.27.2 so I guess that makes sense.
Although I'm interested in vi/bc/dc improvements, and our own contributors fixes to same, I really like to use the latest fixes to the BB ash shell, which dCore uses.
P.S. at work, which is an all-windows shop wanted to bring up an older machine - and I didn't have my stick with me. The ease of the rc release of focal64 burn-n-boot impressed the higher-ups since all we needed was a 10 minute fix until the IT guys could revive their downed windows box. Yeah!