It looks great. If I can live with sublimetext being closed source I’m sure I can live with my terminal also being closed source.
Heck the windows terminal and macOS terminal are closed source and I use them everyday.
Microsoft open sourced their terminal components a little while ago https://github.com/microsoft/terminal The team at Microsoft managing this are super responsive on Twitter https://twitter.com/DHowett https://twitter.com/cinnamon_msft