I don't think there is any one cooker that truly excels at everything. I love m pellet cookers for the convenience, and consistency of flavor profile. THat - I can adjust by adding an Amazen tube if I want. I love my Weber gasser if I am searing, or cooking a bunch of burger or hot dogs for a group that is not BBQ savvy.....
And - I love my Smokin' Tex for the convenience when doing pulled pork. Cant beat it. I love my PBC for chicken, and other cuts of meat - but it is not my first choice for long, low and slow - or searing. It is a "power cooker" in a specific temp range - and unbeatable for that!
But, the Smokin Tex cannot cook chicken that you can eat the skin ( way to rubbery...) because of how well it retains moisture. That is a plus for the pork butt - but a negative on the chicken. And the pellet grill can sear....if you put you Grill Grates in it - but still - NOT like a Weber gasser with Grill Grate in it
......
So - my point is that for the same reasoning that we have several different knives - we need several different cookers. Each one does certain things better than the other. My paring knife is great for detail work in tight around bone - but it is not the best choice for slicing a full packer brisket
. Can I do it? Sure - but the results will be a compromise, and fall short of expectations.
The same is likely true for cookers. There may be some exceptions at the upper end of spending - but in the practical range of where most of us live...... I think this hypothesis will hold true
.