I think that Lemmy has the opportunity to replace Reddit, time will tell how far this can really go. Just weeks ago, posts on here were only getting hundreds of upvotes. However, now I’m seeing multiple posts hit thousands a day on lemmy.world. There are many improvements to make until then, some UI, and UX improvements. I know that many people still have trouble understanding the concepts of federation so until those can be resolved I still think that it’s not going to reach that level of accessibility. I think we all know how Reddit failed here and lost many users.
I see where you’re coming from, I don’t like advertising and in order for Lemmy to really get as big as Reddit it would probably need a more robust monetization model eventually. I don’t care to pay for good services as long as they are useful and don’t steal my data. However since it didn’t start like that it’s never going to work out, many people won’t go for that.