The 4-piece kit is the staple set-up. More or less, almost all drumset drummers would go through this basic setup. Somehow, it's a classic, industry-standard setup.
I grew up using a 4-piece setup. My first kit was a 5-piece kit. But I removed the second rack tom. I thought that the 4-piece setup is the industry standard, is the most versatile, and it challenges me (up until now) to be creative out of a few pieces of drums. And I also like the fact that the ride cymbal can be positioned closer to me.
I still dream of having a multi-tom drumkit someday. But somehow, we will still come home and play on a basic, less-is-more 4-piece kit.