Digital_Igloo, thanks for discussing this and I hope Line6 listens. There's a big world outside of this forum and if Line6 implemented support for IR loading it would be an enormous step up in competitive feature power and a win win for both Line6 and the consumers.
The line6 forum might not the best place to ask about the IR features since it's the consumers on other forums that use other products that is your biggest target here who really use IR's. Ask the question and a start a poll on TGP and it will be answered!
Line6 develops great products in the most competitive price range market where +95% of users can afford a product.
Yes, the vast majority of average users will never know much about recording or the big importance of IR's, but the majority of pro's or educated hobbyists do use IR's in DAW or hardware and know how important they are. Cab IR's are far more important for the tone result than amp models since IR's offers almost unlimited tonesculpting.
With IR loading implemented in the PODs the average joe can skip this feature and continue playing with stock IR's like before, but Line6 have now tapped into the market of users who;
-always use their own made IR's from their own guitar cabs.
-only use third party IR's.
-like doing eq tone matching IR's & exactly copy guitar tones from songs & recordings with DAW eq matching software like Ozone.
Notice that later this year the Atomic/studiodevil Amplifire desk/floor unit will be released with IR loading feature and several threads about it on the fractal forum have been deleted. Unfortunately Fractal are notorious for censoring posts/threads and ban members on regular basis that mention competitive products. Fractal knows the Amplifire will take some users from them because of the IR loading feature. It makes perfect sense for Line6 to implement this lower cost feature that is the most powerful feature for creating great guitar tones. It would be a good consumer boost for the Line6 company.
Regarding IR resolution & sample lenghts.
Several tests show extremely small differences (if any) comparing Hi and normal res Ir's and most can't hear any difference in blind tests.
I'd suggest get the most common used resolution and lenghts, no need to go hi res at all. I don't care about the hyped Ultra res in the axe fx at all after comparing. The ultra res boarders to be false marketing, created as a closed format that can be markeded and it's proven by Jay Mitchell to have less resolution, unlike the marketing claims. He knows more than most about IRs and speakers.