it's worth it just for the navigation helpers alone: '2' will bring you to the next 20-minute-after-the-hour entry (pressing again takes you to the next hour+20 minutes, same for the other 0-5 numbers). E will bring you to the next error, W to the next warning. And O will take you to the next entry with the same correlation ID (request/session/whatever .. you define it). And adding shift to all those keys reverses the direction. And naturally we're just scratching the surface.
I recently started appreciating lnav with JSON logs, where you can recreate a normal log-like experience by picking fields that are displayed (but you can still press a key to see all the JSON fields when you need them). I do wish there was support for switching formats so I could switch between different "views" over the same data, maybe it will be possible someday :)
lnav was a godsend with a particular project several years ago where we had a server bombarded with IOT messages and had to create some order from all the chaos. I actually went and donated some money to the project then, it really made my life easier.