Truly a first-world problem but damn, where are my cheap SSD's?
Samsung 960 EVO 500GB at $250. That's insane my friend. I guess it depends how long you've been in the game.
I remember my 40MB drive being huge after we upgraded from a 12MB drive. It was truly hard to find enough to fill it up with.
I should probably take the time to reformat & reinstall across both as a ZFS partition, then wait another year for 1TB prices to come down. 1TB SSDs just aren't cheap enough yet for me to justify buying one. 500GB will fill up again very quickly once everything is on one drive.
I'll frequently shoot a few hundred camera raw photos, then export many as 16-bit TIFF to be stitched into large panoramas or fused together (using exposure bracketed photos). This uses huge amounts of disk space and I want a minimum of 100GB free space as a buffer.
SSDs have added a storage tier. You're doing the natural thing; just get better at it.
Intel has created a hybrid solution with 3D XPoint. You can plug a relatively inexpensive Optane module (32GB/~$80) into an X299 chipset motherboard and you'll get most of the IOPS benefit of solid state using a traditional disk in a transparent manner; the Optane module provides a huge cache with lower latency than flash.
IMO, more importantly 500GB SSD's are 150$ which are much bigger than 256GB drives as you OS takes up a lot of space.
On one hand, some people pay $200 for an entire computer.
On the other, $200 is what an ordinary hard drive used to cost.
It's even worse as a Mac user. I'm currently in the process of replacing my aging iMac with a new one and since I need about 1 TB of storage and won't allow any spinning drives, Apples wants me to pay about 840 € for upgrading the default fusion drive to their 1 TB SSD, which is of course very fast storage, but painfully expensive. I'm actually considering opting for the smaller 512 GB SSD and getting an external 1 TB SSD from Samsung later.