Haven't tested out the new CX90 myself but have heard that a lot of folks aren't happy with them. We have an '18 CX-9 and just really enjoy that vehicle. With you saying that about the CX50, makes me wonder if Mazda is straying too far from what made people love them.
Although Mazda's aren't the vehicles for me, I do love the style of their vehicles and they're great to look at. But with me, it goes beyond just looks. I give Mazda a lot of credit for sticking to what the folks who love them, love most about them; "Driving Dynamics" and a more premium vehicle that competes with the mainstream vehicles in their respective segments.
Mazda really dials in those dynamics into all of their vehicles the best they can for the money and the budget in which the engineers have to work with.
Mazda is not a large car company and only recently started breaking into/going over the 300,000 total sales for their first time ever here in the U.S. For example, Toyota sells more Camry's here in the U.S. every year than Mazda sells all of their vehicles each year in the U.S. Mazda pours into their vehicles, things that don't mean as much to me when buying vehicles. I mean, it does mean something to me, just not as much as it does for others. And I think that(just about) every car company is making a nice vehicle.
Mazda does in fact build beautiful vehicles to look at especially in certain exterior colors(Soul Red, Deep Blue, Pearl White). But too many of their cars come with that all depressing, black, on black, on black interiors. Sure, you can get other interior colors but they're difficult to find with the(more interesting to me) paint colors that I desire. And I know, all car companies are now building most of their vehicle with all black interiors.
I do recommend Mazda vehicles if this is what you like. Their styles are great, their build quality and reliability is up there with the best and their customer satisfaction has been through the roof. What's not to love?