You mean "historically important" other than smash hit after smash hit? I could walk into 25 restaurants in any town in America and ask all of the patrons inside "regardless of age" if they've ever watched the Joni Mitchell concert that featured Jaco on bass and all but a very few would say "Who is Joni Mitchell?". Every single one of them would say "Who is Jaco?".
The vast majority of them could name at least three Taylor Swift songs and at least one of her boyfriends.
Joni Mitchell is of historical significance TO YOU. Taylor Swift is historical period.
I honestly don't have a problem with either of them. And, sure, Joni was more educated. But, in terms of history, her entire career didn't amount to Taylor's career (in terms of sales and cultural impact) didn't amount to what Taylor's has so far. And Taylor is only 30 years old.
So, smash hits, and being famous because of radio play and your looks on video and in awards ceremonies, are what make someone historically significant, rather than their influence on history and culture and impact in the world, and how they changed the world. Gotcha....
Joni is historically significant to the level that when I went to college studying music, taking music history as taught by a music history professor, Joni's significance in history was part of the teaching. Her impact on the music industry, the popularity of female singers veering into rock territory, the trick of writing radio-popular songs that had social and political messages which would remain relevant for many years.... those are some of the reasons why she is historically significant.
Joni's entire career compared to taylor's? Don't bother with finances... they're totally different generations, and Joni eschewed money and donated it all away frequently to help others. You can't compare on financial value. Taylor went mainstream and became the #1 artist repeatedly in her genre, so of course she is more popular with the average listener. I like her music very much, actually.
Joni was one of Prince's favorite artists - one of her albums he claimed to be the last entire album he loved. She is one of Bjork's favorite artists.
And you said she reminds you of Taylor... ah, the irony of that statement, considering it's the other way around.
Taylor has cited Joni as one of her main influences and idols. She was considered to play Joni in an upcoming biopic, although it didn't happen. Joni was asked for her opinion about Taylor playing her, and Joni said some sarcastic remark about Taylor trying to sing her music. She says she's never paid attention to Taylor's music (how hard it must be for someone like Taylor to hear that from her idol!). Whereas, Taylor named one of her own album's after one of Joni's albums, as a compliment with a similarity in album structure too.
Citing Joni as reminding you of Taylor is like looking at a beautiful mountainside with clouds over top and water and trees at the bottom, and saying "it looks almost like a painting".
Joni came first by several generations and is a big influence on Taylor and several generations of musicians to follow. Taylor came much later, and became a pop diva who I guarantee wouldn't be as successful if she didn't look like that. I'm not diminishing Taylor's talent.... but I do side with Joni that there's no way Taylor could sing many of Joni's tunes... they're far too challenging.
Anyhow, I'll leave it there.
I do tend to rant LoL
Cheers