My FIRST EVER sub (when I was a TOTAL NEWBY teenager) was an externally powered sub (NHT SW2P with the external 80 watt amp).
I treated the sub just like any other speaker. I power the speakers with an external amp. I also power the sub (which really is just another speaker for 20Hz-100Hz) with an external amp.
Like all things, there are always pros and cons. Everyone decides what is best for them, which is no different then people deciding to buy separates AVP + Amps instead of just AVR.
Is a powered sub really that much easier? I think for all of us here, it’s not about ease of use. It is about something else. Just like for all of us here, an AVR isn’t that much easier to use than a separate AVP + Amp.
Every time I talk about this topic, it seems like I am the ONLY person in the world who thinks that Passive Sub + Amp is similar topic as AVP + Amp.