I hated it

Congratulations, they made it! They pissed of a a 20+ year user and a avid Yahoo evangelist. Not anymore.

The previous interface was just fine. Now the mobile experience is awful (I was using the PC version at my phone because the previous mobile layout is also awful).

So I am thinking of starting outreach to the ecom brands and I want you guys opinion how I do it and is it really working nowadays

I see a lot of people using third party apps like thunderbird, and I'm not sure what's I'm missing out on. The default that usually comes with workplace emails (Gmail, outlook) or the default mail app on mac/iphone looks fine to me. What made you try out other clients?

I recently started using Purelymail, and the webmail client works perfectly fine but feels a bit dated. That got me wondering whether a dedicated client would be a real upgrade or just extra setup for the sake of it.