Wholeheartedly agree. And even if a feed ships a lot of text, the reader software can always trim it down and/or present it as it wants. For the website builder I develop and sell, I use the reader side of RSS as a 'social timeline', so there's no room for long articles in the feed anyway. Want to read more, just visit the website. The website is the best place for ads as well, dirtying up your timeline with ads is a no-no for me.
I also want to use the opportunity to propose a new name for RSS, which is 'Really Social Sites' or 'Real Social Sites'. RSS had name changes in the past, so it's only natural it gets a new name when it will revive in the coming years. And since all this web3 sh1t (names without meaning) I really felt the need to put energy in RSS and also it's name. To make it more accessible to everybody, not only devs and nerds, it needs a better name. Nothing else has to change, RSS is rock solid as a technology. Can't wait to use my own software to read the personal blogs/websites of all you guys and gals. Social Media without Big Tech.