Congrats Tom, four years is an awesome anniversary to celebrate. I remember what I was doing 4 years ago more or less - looking after a 6 month old and not thinking about blockchain anything lol.
I'm still learning all the ins & outs of Hive and while some of it goes over my head completely, it's posts like yours that urge me to go learn more :)
Have a wonderful Hive anniversary.
Cheers
Ranger Andy