is there any-thing that indicates digimon-adventure tri. did well (if i can ask)? digimon-tamers at-least seems 2nd most popular according to a poll i think. also the blu-ray sales were also good iirc (not comparable to digimon-adventure but that's a given i think i think, besides the blu-ray for digimon-tamers came a few years later).
also i don't think sales went down dramatically for digimon until digimon-frontier (sadly) which is why the series ended there at the time i think.
tri's first two movies sold well in theaters, I think one of the remaining four might have sold well as well (the 4th one maybe, because that was the only movie that wasn't complete shit). The fifth and sixth movies totally bombed, but for how horrendous they were the sales might as well have been a success by comparison
I think Frontier would've been better off coming out before Tamers, since it was less mature and had some Adventure nostalgia going for it like having Takuya and that edgy tryhard wolf guy's Digimon forms often have Greymon and Garurumon in their names, plus even the Digivice in Frontier looks similar to the 02 D-3 Digivice. Tamers had a significantly more mature and realistic tone than the other series, with Digimon deaths even being permanent and it being possible to consume a defeated Digimon's data. Would've sold better with an older audience that was 3 years older than when Adventure came out.
Frontier's ratings on TV were good or at least ok, but the toys didn't sell well at all. Same thing with Savers, except literally no one was buying the toys then because people were 7 years older than when Adventure came out and they were either too old or too used to more advanced game and technology to bother buying black and white 8-bit toys like the Digivice replicas. That and a lot of the older fans had moved on to more teen and adult geared shows like (ironically) serial experiments lain, evangelion, texhnolyze, Berserk, Gantz, Full Metal Panic, Death Note, One Piece etc. Xros Wars did better because now older fans had nostalgia for their favorite show from 3rd grade, and newer fans saw something novel. Savers was boring trash for the first 25 eps and later devolved to faggotry with the Yggdrassil arc from what I'd heard, and the main character was a banchou archetype you'd expect to find in shows geared for preteens and teenagers like Yu Yu Hakusho and Blues, Slam Dunk, Bleach etc. so the little kids that Digimon targets obviously didn't take well to him. Ofc that didn't stop the final season of Xros Wars from bombing big time from what I'd heard (never really watched it), and tri was... well, tri., and the new Digimon Adventure reboot is already looking like just a massive wankfest to original Adventure, writing off any possibility of a second season by making Pegasusmon already accessible.