What did I miss?

I created this account roughly 2 years ago, and then I got caught up in other endeavors, hobbies, work, and personal matters. Since I was gone, so much has changed on steemit.

Is there any sort of comprehensive guide that can let an old user know what changes/updates have transpired while their account was idling for more than a year?

Has there been any growth in the number of users/accounts on steemit? Have we lost members/users?

Is there a place where I can see the top posters, most followed blogs and most trusted steemit accounts?

I saved a password when i made this account years ago, but it seems like passwords have been replaced with a lot of different keys/qr codes-- and i'm not exactly sure which ones are valid and what they're used for.

Another thing I noticed is the TRON/TRX wallet. I just set it up, but not sure what purpose it serves. How do TRX rewards work? What can you to do participate in TRON rewards? Whom should I follow for advice on this topic?

Perhaps @steemitboard can advise?