Well, it’s a tricky one. We can go by number of symbols and truncate the rest or clamp a number of lines. With number of symbols it’s consistent amount of content across viewports while with line clamping you may be getting less on mobile for example.

What you’re suggesting is choosing a range of number of characters, say 100-120 and truncate to 100 if the total is 120+, and not truncate at all if it’s under 100. We can experiment with that and see if it adds much overhead to feed rendering.