^^Personal preference and perception.
I have Mech. Mods b'coz I love their LOOKS
Plain & simple. No holds barred - I just didn't like the "looks" of any other Mod, VV, VW, P-vari or otherwise.
Most of the Mech. Mods look awesome. Remember, I started the post stating 'personal preference/perception'. This is my view. And I stick to it. B'coz, while shopping, I looked 'only' for mechanicals, after online galloping of all APVs. I didn't know about Low Resistance, Sub-Low Resistance, Std. Resistance et all. And till now I do not know what's the resistance of my Carto-Tank!
Oh yes, I'm not into RBA, as yet. Just F-16 over my Sigelei #8... and I'm loving it! Yes, while on the foray for a Mech. Mod I only looked for the "looks". I purchased what I liked 'looking'. It's another matter that it vapes amazingly. The vendor sent me LR cartos for the F-16 and I'm sticking to that.
Do I need another APV? No. Do I need to try another 'delivery system' and thus, another Mod? No. As long as I'm getting satisfying vape, as long as my Mod looks GrREeAaTt - why do I bother!
So, mechanicals will all be - for me - I guess. B'coz I can't 'look' at others. Am I missing out on something? Probably yes. But then again, my ignorance is my bliss I think!