Looking to get into the newsletter-writing game. What's the best newsletter-writing/sending software out there right now? For emails

Looking to get into the newsletter-writing game. What's the best newsletter-writing/sending software out there right now? For emails
A couple people I follow use Buttondown:
https://buttondown.com/
Seems like that’s the popular choice since TinyLetter went down.
I switched from MailChimp to Buttondown bc of MailChimp's AI bullshit. It's…fine. I personally don't really like it because I'm learning that I despise markdown for this kind of thing and Buttondown doesn't really work for what I need to use it for (I sell products, most Buttondowners I've seen do writing newsletters) even when I switch to the raw html editor, BUT that's probably just me having a fucked up mix of computer skills, a lot of people like it.
I want to start looking into Ghost instead but what I've seen makes me worried that it might be even more tech-heavy.
Seconding Ghost as a viable option - I often see it at the bottom of some of my fave newsletters, so it must be doing something right