In a popular post today[1] the title claims "VM in Google Sheets", but it's actually in Google Script, which is basically Javascript and not an interesting technical accomplishment (definitely a useful educational tool, though).Disappointed, I set out to fix it. Voila!
https://docs.google.com/spreadsheets/d/1g3-FZBnkDuLqFYOmk457...
A Brainfk interpreter in pure Google Sheets formulas. The hard part was parentheses matching, so I think other VMs would be even easier.
[1] https://news.ycombinator.com/item?id=14701460