We do plan on sending email notices for new TA / TF releases. However, the problem with email is that people don't necessarily get their emails. A shocking number of our customers purchase receipts gets bounced back or get trapped in spam.
Which is why sending emails for new releases is not a priority for us (because a majority of users wouldn't even get eyeballs on that hard work), and because RSS is a significantly more reliable transmission method. Why? Because you opt-in to the RSS feeds you want. And our hosting is rock-solid (we've been doing this for around two decades). There are no middle-men deciding whether you get to see what we post.
So, I'd say get yourself an RSS reader that you plan on checking. For iOS / macOS I'd recommend NetNewsWire: https://netnewswire.com/
Thunderbird does it if you don't have an iOS mobile device. But there are literally thousands of them.
Yes, RSS is old tech. But it's simple. And it works.