Some of it was troubleshooting stuff, some of it was helpful advice for setup and problem solving for a variety of things, and a ton of it was educational top-level comments that provided the whole context for the threads under them. I had some 500k karma on a 4 year old account, and 0 posts. Everything was purged regardless, because I felt like it.
It’s not my job to retain information for the future, but you can look at an archive of it anyway if it really matters to read, so it’s not actually a huge loss in most cases. Just more work for you.