For me they were.
I still remember the first PC I put together for someone with a SSD.
I had a quite beefy machine at the time and it would take 30 seconds or more to boot Windows, and around 45s to fully load Photoshop.
Built this machine someone with entirely low-end (think like "i3" not "Celeron") components, but it was more than enough for what they wanted it for. It would hit the desktop in around 10 seconds, and photoshop was ready to go in about 2 seconds.
(Or thereabouts--I did time it, but I'm remembering numbers from like a decade and a half ago.)
For a _lot_ of operations, the SSD made an order of magnitude difference. Blew my mind at the time.