This question is geared towards people who use them as a secondary instrument.
I had a JMJ and an EB-0 and really liked the sound but I had issues with both of them easily going out of tune and the JMJ I couldn't adjust the saddles on them, so I sold both. Maybe a skill issue, but that's been my experience.
Anyway, I'm a bedroom player at this point and I want to get a cheap one for goofing around. How often are you picking up your short scale over your long scale?
Well...
Which short scale? Out of the 27 basses I own currently, 9 of them are "short" scales (31" or less). Only one of them is in more or less "permanent" use - as in, I can just pick it up; plug it in; and play it any time I want. It's an older, '90s MIK Rogue VB-100 violin bass, strung with Roto 88 Tapes. Like a certain other left handed player's Hofner violin bass...

It sits out next to a long scale bass that I play a lot, too; a '73 Rick 4001...
As for the others? With that many basses - all of which get played -, I rotate 2 or 3 of them out of their cases each month; set them up in the living room; and play the snot out of them all that month. Then, they get cleaned and put away 'till their turn comes 'round again. And, 2 or 3 more take their place... So, all my other shorties get played when it's their turn in the rotation.
So, I guess my answer would be - I don't use a short scale bass as a "secondary" instrument. I have no problem switching between scales, and if I know that a song I like to play was played on a short scale bass originally? That's what
I play it with...
Finally; when they are finally finished being built, in the next few months, I will have 2
more short scale basses. A Serek Sacramento Bass, and a Birdsong Fusion lined fretless bass. So...
To me? No, I don't think of short scale basses as secondary instruments. But, that's just me...
