I've been playing Electric bass, Double bass, and cello some 50 + years, now, two of my basses are 5 stringers, 9 are 4 string, and 1 is a 6 string. While I agree that 5 string basses are faster (probably because of the string spacing), my 4 newest purchases have all been 4 string basses. It's where I most comfortable.
Also, I think I've moved through all of the high speed - look at me stuff, and I find myself getting back to being a bassist (I'm not criticizing anyone's style or choices, just commenting on my own). Not by any deliberate choice, but voluntarily nonetheless. I simply find that I enjoy playing BASS more than slappin' and poppin', or being a lead instrument, unless the number requires.
Yes, I still get the occasional obligatory solo (though I prefer to solo on a double bass), on electric bass, and I still slap, pick and pop during it, but I find playing bass (as in rock 'n' Roll, and classic rock, and blues styles) most enjoyable.
I use a 5 string when doing jazz, funk, and fusion numbers, but for R&B, Rock, Pop, Blues, and standards, I automatically go for the 4 string.
Some of my favorite playing is done while playing stand up bass with a small combo (Bass, drums, piano and sax) with a really fabulous female blues/jazz vocalist (picture a small, darkened, smokey venue, candles on the tables, and a sultry chick singing Girl from Ipanema).