interesting conversation about practice time.
imho, technique of any sort (bass/piano/pedals/synths) is there in service of what you're trying to do artistically. so, i recently started practicing keys because i wanted to play some synth live and bought a synth (buyer's guilt can be a good motivator for practice

). it wasn't just a matter of some abstract need to practice keys. and i believe that, in the long run, everything you do goes into the melting pot that is *your artistry* . . . however you spend your time in music will come back and help other facets and all that.
if you're creating, i wouldn't worry about technique; when you realize that you need to have more of it, you'll start working on it.
i have a weird life in that i work from home 95% of the time. so my day starts with a short breakfast and then an hour of practice (and writing posts on tb that are rife with typos

). i like practicing when i'm still half asleep cause i've had some breakthroughs due to being barely conscious (since 90% of what do playing bass is improvised, i work on idea creation).
if don't get my day work in, i work on music stuff: programming my new synth, writing music, practicing bass. if i do have work, the music stuff doesn't happen. after dinner i do some more (tonight was piano—i got guilted into it by my earlier comments—and then spent some time trying to break in new strings).
i've basically kept the same regimen for the last 25 years or so—even when my kids were young and i had a regular job, i'd get up early and do the practice thing before taking them to school, practice during lunch at work and then do the nighttime thing after dinner or play gigs. and there were some nights of three hours of sleep (did i mention i got pneumonia at this time?).
anywho, i'm a *big* believer in routine. luckily my spouse is an artist and can deal with it most of the time.