When talking about switching to Lemmy, the idea that gets communicated often sounds very abrupt. Despite Lemmy growing a lot, for at least a long time it will never reach the amount of content Reddit has, so a majority may feel discouraged to keep using Lemmy. But that doesn't have to happen. You can keep browsing Reddit to find those things you need and for those small communities that still haven't migrated, and in the meanwhile be part of Lemmy by creating posts and commenting on them, as long as you do it. One day, there will be enough activity here to let all of us use Reddit only for archival purposes.
Felt like it was important to say to make the switch less intimidating
I switched to Mastodon almost all at once, but I still check it for, like, five people. I feel comfortable with that. Reddit is much less of a "check it" style thing (it's more of a browsing / doing an activity kind of thing IMO), so I'm not actually quite sure that I'll even end up wanting/needing to go to Reddit
… other than the huge number of [really helpful] Reddit posts that appear in search results.