95% of builds on Path of Exile scale with special uniques or powerful rares
The reason it is still fun after 20+ hours of play is because of the skill and gear progression that comes with most builds in the game. 95% of builds on PoE scale with special uniques or powerful rares as well as getting gear that has more linked sockets (5 socketed and linked sockets on gear are a lot more rare than 4 linked gear, and 6 linked gear extremely rare and endgame to acheive in most cases). Both of these will change will change how the skill works/increase their damage output significantly, making you want to progress even more to see how far you can take a build idea.
So the long and short of it is yes in it's most basic form the fun of playing the same skill over a long period is to see the returns of your investment into the skill and seeing how far you can take it, which is much more rewarding than it sounds due to the sheer complexity and number of options the game has to offer.

Feb
PoE 3.13.1e Patch Preview
This is a preview of 3.13.1e patch notes to give you an idea of what to expect. Check them out below!

Aug
poe4orbs:[Lake Of Kalandra] PoE 3.19 Witch Phantasmal Cremation Necromancer Build
This PoE 3.19 Witch Phantasmal Cremation Necromancer build can tank all but the deadliest mechanics in the game and extreme degens that you aren't immune to already.

Sep
poe4orbs:10 Minutes Delivery Guarantee will be added on poecurrencybuy.com
Poecurrencybuy delivery guys may not be able to finish the delivery for all orders within 10 minutes. In order to make those whose orders are not delivered in time feels better, so have decided to develop “Delivery Guarantee” function, this will let those who have waited for longer than 10 minutes get the compensation from us while not to have negative feelings to our site.

Jan
Best PoE 3.13 Ritual Witch Starter Builds
Many of the builds in this PoE 3.13 Ritual Witch Builds guide are good for starter that are popular with many players. For the three ascendancy classes of Elementalist, Occultist and Necromancer, the focus of each build is also different. Hope it helps you.

Mar
Making a build of my own for the new legacy league
Plan on going into hardcore legacy and trying to learn quickly- I expect a lot of rage on my behalf. Looking forward to making a build of my own for the new legacy league.

Jan
People saying that there is no P2W in Path of Exile are correct
no Poe hardcore player so if i did anything wrong dont bust my head for it. all i ever learned about the game in that few play was chromatic orb, didnt learn anything about regret.