I never understood this four-string, five-string, or six-string argument.
Play what you think is more appropriate to your style.
As a former guitarist, for me the 6 strig bass was the easiest way to visualize the bass, I have 6 strings on guitar, I have six strings on bass. When I started playing the 6 string bass my abordation was different because I tuned the bass: B E A D G B.
It made more sense to me, on the 6 string guitar I'm going from E to E, on 6 string bass I want the same, not from B to C, but from B to B. This helped a lot because at that time I played a 7 string Steve Vai Universe Ibanez (B E A D G B E) and I had a solid muscle memory after years to memorize the scales on guitar.
So, few years I played only on 6 string basses. In early 2000s I bought a USA made 5 string Peavey Cirrus, the same model was used at that time by Mike Porcaro in Toto, same colour (Tiger Quilted Top). After I never played again 6 string basses, and I never owned a 4 string bass. I don't hate them, they are not my cup of tea.
Many of my favorite bass players are 4-string bass players (Mark King, Louis Johnson, Vincen Garcia, Stu Zender), also a lot of them are on 5s (Tom Kennedy, Justin Raines, Johann Asmundsson) or 6 string basses (John Patitucci, Andrew Gouche), I like them no matter how many strings they have on the instrument.