I never met or chatted with rpietali (Risto Pietilä), but I did read quite a bit about his crypto-journey.

If you are interested in rpietila's story, here's an obituary written by Risto's long time friend and a business associate.

It's in Finnish, but Google-translate does a decent job if you just ctrl+c & ctrl+v.

https://skepsisblob.blob.core.windows.net/skepsisweb/Skeptikko-2021-1_Risto_Penttila-Muistokirjoitus.pdf

Also, the Finnish Wikipedia page (for what it's worth):
https://fi.wikipedia.org/wiki/Risto_Pietil%C3%A4