The problem is that G1 started fractured, even just in the US; Marvel Comics vs Sunbow Cartoon. Then G2 as the weird 90's growth on the side of the Marvel continuity. G1 has iconic bits, but it in itself has no definitive iteration. You can make an argument that the Sunbow toon/movie is much more well known than the comic, especially now, but the Marvel comic is still influencing the franchise to this day. Hell, Primus long ago overtook everything else as the core origin story.
Also I think this phenomena got a boost when Dreamwave did a pretty straightfoward G1 retread and then died after only a handful of years, leaving IDW needing to go with a much more original direction to differentiate themselves from a series that wasn't even 4 years old at that point, so in just a handful of years, we went from 2 main US G1 continuities, to 4.
Beast Wars, though? Aside from some oddities with the initial toy bios, basically just had the cartoon (in the US at least). That's it. It's iconic to Beast Wars in a way that the G1 toon or comic could never be to G1, just by nature of being a singular oddity. It didn't get a real comic series until like a decade after it started..
I think it's only really notable because Beast Wars/Machines is so much different than everything that came before and everything that came after. Even something like Transformers: Animated has deep roots in G1, even if it has an aesthetic, style, story and characters all of its own. And even THEN, they'd probably be REAL skittish at trying to reimagining TF: Animated.
Beast Wars is that like times ten.
To the point where, ironically, Beast Wars sees more reimagining in non-Beast Wars stuff (IDW's G1, Rise of the Beasts) than it does from the stuff specifically about Beast Wars.