"This chart shows how much my steam library has grown over the past 10 years :)

Milestones
1K Games Owned @ 2015-12-30
1.5K Games Owned @ 2016-04-12
2K Games Owned @ 2016-07-13
2.5K Games Owned @ 2016-09-19
3K Games Owned @ 2016-11-11
3.5K Games Owned @ 2016-12-28
4K Games Owned @ 2017-02-12
4.5K Games Owned @ 2017-04-07
5K Games Owned @ 2017-05-30
6K Games Owned @ 2017-09-06
7K Games Owned @ 2017-12-22
8K Games Owned @ 2018-02-24
9K Games Owned @ 2018-05-10
10K Games Owned @ 2018-09-06
11K Games Owned @ 2019-04-24
12K Games Owned @ 2021-03-17

How-to
I made this using MS Excel and a web archive scraping script, which you can download here:
https://cdn.discordapp.com/attachments/329829406153375755/594610218118152202/Steam_Web_Archive_Scraper.user.js"