Email doesn't support the general markup you can often expect to see in a blog post and email to rss tools to date haven't offered good means of filtering the output to tidy that up, specifically with things like inlining styles which remains important.
Folks who care about sending good emails quickly realised that the tools just aren't good enough so have resorted to sending the emails separately.
There are obviously other factors at play but that was a big one for me when I looked at the tooling a decade ago when I used SFMC (which offered email to rss functionality).
Email doesn't support the general markup you can often expect to see in a blog post and email to rss tools to date haven't offered good means of filtering the output to tidy that up, specifically with things like inlining styles which remains important.
Folks who care about sending good emails quickly realised that the tools just aren't good enough so have resorted to sending the emails separately.
There are obviously other factors at play but that was a big one for me when I looked at the tooling a decade ago when I used SFMC (which offered email to rss functionality).