There are plenty of players that desire/demand 19mm string spacing at bridge, regardless of string number. And, I am glad that there are many such models available in 5 string to meet that preference.
However, I am very comfortable w/16.5 mm string spacing, so this type of 5 is my fave, especially in context with reasons 1 & 2.
Indeed. And the variety of 5-strings available means that no-one should dismiss 5ers based on experience of one instrument. I tried some that convinced me I'd stick with 4, and then a couple that showed me the light! I've still not tried every combination of neck shape, nut width, string spacing and scale length out there but I have found that I like a 19mm, 35" scale with an asymmetric neck profile. And I play mostly fingerstyle, just to show again that you need to try basses out rather than rely on internet advice!
For all I know, I may be even more comfortable yet with tighter string spacing, or on a multi-scale fanned fret neck, but for now I'm comfortable. And not looking to go back to 4 strings!