Devin
I just checked on both the Simplicity & Riccar websites, & there are only 4 models now - straight suction, turbo brush, two brush full size pn, & tandem air. There is no compact pn model listed, although if you look in the accessories it shows up separately. The tandem air premium model has yet to show up on either website.
If the compact pn model is being phased out, Tacony is being foolish & should reconsider. That model would be direct competition for the Miele C1 Titan & Delphi. Lots of people with hardwood floors & a couple area rugs would buy a canister vacuum like that if it was priced right. Hardwood with area rugs is the new trend & what most people are doing now.
I highly doubt there will be 2 tandem air models. My guess is that once the premium tandem air model with the lifetime belt comes out, the current tandem air model will be discontinued.
As for the 3 brush full size pn with dirt sensor being pointless now that the tandem air is available? I disagree with you on that. The pn that should have been axed is the 2 brush model. That brushroll is wimpy in comparison to the 3 brush pn, & there are plenty of people who would want the dirt sensor feature. In fact, it's one reason why I purchased my Simplicity Gusto. The other thing is, although the tandem air powerhead is nice, one HUGE disadvantage it has is the powerhead's height - it is too big to get under beds & other low furniture easily. Since that's a reason why consumers would buy a powerhead canister over a upright, many people would prefer the full size 3 brush pn model. As much as I like the tandem air technology, I do sincerely hope that Tacony redesigns the hood & reduces the height of the tandem air powerhead when they bring out the lifetime belt model.
Rob