The reason why a2o lite became a sensation

‌First of all,
Was it as much of a representative generation for sensational songs as (previous groups)?
On this point, most people seem to lean more towards "no" than "half and half."
That doesn't mean the songs are bad. If they were, hitting #1 on Melon would have been difficult.
However, the songs contain nostalgic rhythms that remind one of the Yoo Young-jin style, similar to f(x).
In addition to this, combined with SM's signature intense choreography, it is clear that their dancing has been upgraded compared to the standard level of existing idol girl groups.
While a member named "Ai-jing" reminds one of BoA, the overall dancing quality has improved.
NewJeans is also mentioned for their dancing, but rather than just being "good dancers," their overall production quality was high. I believe the top two members of a2o are among the top-tier dancers in the girl group category.
Anyway, whether it is the dancing or the music, if talented idols and great performances are being delivered, it is something to welcome.