Nostalgia bias and internet bubble, for the wide market it doesn't have much relevance anymore, an association can only last so long if you do nothing to keep it alive.
In Japan it was never the case for both arguments, most popular and being associated with Nintendo, with Tales of Symphonia, either for the wide audience (all players, as the game released and sold best on PS2 then got a remaster on PS3 a decade later) or the core audience (the ones that will show up for Tales of Festival and buy all related Tales merchandising)
In western markets it's been 20y now, part of the audience who is playing Tales now wasn't even born then and the only way to experience the game they have is an incredibly poor remaster of what is now a dated game on PS4/NSW/PC
Sales wise the game sold ~1M WW on GC and held the best selling title for some time... until Zestiria, now Arise stands at 2.7M and it's not even a contest.
There's no denying ToS was sort of a "FFVII" moment for some (especially in European markets) and I have no doubt the 25-35y old audience is a vocal one in videogame communities, but there was nearly 0 attempt* to capitalize on it from Bamco either on the title by giving it some worthy legacy or on the platforms (Nintendo that is) it kept having a lingering impact.
And as mentionned Bamco moved on, from a videogame design point of view, about everything that made Tales of Symphonia what it was, Linear Motion Battle System (heavily inspired by SoulCalibur), Fixed camera, chibi design, cel shading, Fujishima character design...
The
Tales of recruitment page these days lists being a Tales fan as a plus for inspiration... starting from Xillia that is
*a cheap spin off sequel on Wii 5y later and an untranslated Abyss Port on 3DS 8y later aren't what I would consider a good enough effort
Except Zestiria (first episode on Steam, usual phenomenom) the answer for them is PS platforms, for Arise nearly two thirds of its numbers came from Sony platforms.
On Vesperia DE we have hints it sold best on NSW but it's a lower seller and the margin between NSW and everything else isn't as big.
The question that mattered is an hypothetical scenario where Arise released on NSW 1) how much would it have increased sales and 2) what share of the sales it would have been.
If Japan is anything to go by (with multiple IP having done that jump) my bet would have been on
1) A bit but not a sizable one (between 5-20%)
2) A good chunk but not leading, especially for a first entry back on the platform
Thus it would give additional sales but also mostly gain its sales from splitting the existing audience.