First off, I like the 'hard switch' on my '73 M85 II. I even like Guild humbuckers, though I can't believe I'm saying that and feel like I've betrayed my '21 year old self who absolutely hated the mud-buckers, back in the day, on his/our Guild JS II fretless (but hey, kid, that was 39 years ago! Amps have changed! Get off my back!!).
Secondly, I have heard a very few jazz guys play electric fretless in a way that sounds like an upright, but not on Fender basses. I've owned one '50's V-necked P-Bass and a bunch of '60's basses. I have heard some wonderful P-Basses, but again, nothing that would approximate a stand-up.
But even as I type this, I am realizing that I never dove deep enough into the incredibly deep pocket of the upright bass world to come out the other side and be able to play upright lines with a 34" or 30" scaled electric bass. So I apologize for my intemperate remarks. Mea Culpa.
Do have one thing to say that may make sense. First, I love my '66 SF I bass with the pickup in the 'sweet-spot' (frono's term. My term would be 'only spot!'). That bass with, TI flats, makes the simplest, fundamental-ist bass lines sound wonderful. It's even fun to play root-third-fifth lines, just to hear that beautiful Bisonic/TI sound. Bella, bella.
There are things that a '30" bass can't do though. I've said this on LTG before, but if I were playing hard enough 'hard rock or blues' that my drummer and I, were, in effect, like Pinky and the Brain, trying to 'take over the world,' I'd be using a 34" scaled bass. Probably a Fender Bass, at that.
That's all I got. Wait, one more thing. The absolute most fun I have is playing bass on my SF I, with my drummer of 20 years, keeping the groove going. It's fun to play guitar, to write songs, etc. but the most fun is that 20-year Groove with 'Sticks'. Maybe I did fall into the Deep Pocket, somewhere along the line!
What about you guys, what's the most fun you have with music? Don't tell the guitar guys either, just us Bass guys. Those six-string guys are...such....whiners!!