I prefer HTML emails as they take me seconds to visually scan to see if anything is of interest. If the emails were a big wall of text, I would have to spend several minutes reading everything which is a huge waste of my time.
There's a reason why in the real world, brochures and flyers aren't done up on a typewriter. People are visual creatures and if you're running a startup and marketing products or services and you're not using HTML email, you're doing a disservice to your investors, shareholders, prospects, and customers because the vast majority of people would rather opt-in to receive emails that look good.
There's a reason why in the real world, brochures and flyers aren't done up on a typewriter. People are visual creatures and if you're running a startup and marketing products or services and you're not using HTML email, you're doing a disservice to your investors, shareholders, prospects, and customers because the vast majority of people would rather opt-in to receive emails that look good.