I honestly didn't mind...or even notice...the change in animation style from season 1 to season 10 or so. I thought it was just a digital remastering. But if you look on Greg Bailey's LinkedIn, it says,

"The series was converted over to Flash animation this season from our usual traditional animation format. The show is looking pretty good and the look is quite refreshed looking but still maintains all the great stuff of the past that made it such a success."

I honestly beg to differ with Mr. Bailey here.

I've noticed that his words imply that the change just took place with season 16. So I am OK with seasons 10-15 or so. I wasn't very fond of high-pitched Arthur but I eventually warmed up to it. Season 16 was just hard to watch.

Over time people will get use to the animation, and even if they go back to the old animation style it will not be the same.  As times change so those the animation will change.  You got to live with the changes or you will be stuck in the past.  As for the reason why I say that attack 9 Story Studio is like attacking Toronto is because where 9 Story Studio is, if you burn down or destroy the studio you would pipe out a whole block plus a park and everything that goes with the park.  Best bet not to complain about a company that could affect everyone around them.

First of all: Yes, it is progress. For some that is an unfortunate truth. There is a saying, "if it ain't broke, don't fix it". I think that Arthur was pretty great in the past, so, in my opinion, it definitely didn't need "fixing" through Flash.

By the way, some have pointed out that more recent seasons have had some pretty weak or repetitive storylines. Looking back, I think I agree with them. ("Around the World in 11 Minutes", "Hic or Treat", "Baby Steps", "Arthur's Number Nightmare"). They have said that the show has gone downhill since season 7 or 8. I don't necessarily agree with that, but they raise some good points with the supposed "advancement" of the Arthur series. Some have even claimed that the show has long passed its prime, and that they should just can the series altogether.

Second, I don't think people actually meant to bomb or blow up 9 Story Studios. I think they meant "destroy" in a figurative sense, or they weren't really taking it seriously. They just really hate what the studios have done to Arthur, which I can understand.