Poddley let's you search quotes and filter by name and vice versa. You can find ev everything they've said across all their with timestamps and with a read-along UI.
You can also RSS feeds for specific people instead subscribing to entire shows. I started this because I wanted to find podcasts where my favorite speakers talked about my favorite things (in my case that was certain longevity-research). However simply searching for stuff like "rapamycin", would yield quotes by 99% people I wasn't interested in.
I think this could be useful for people that are journalists, hobbyists, casual people and pretty much everyone that's interested in finding quotes and talking-areas in a podcast by people they respect/want to listen more to etc.
Currently indexing about 10 podcasts due to POC.