I'm always amazed by Marijn's brilliance (Author of Lezer, CodeMirror and the awesome ProseMirror toolkit)
The level of depth he dives into to perfect his projects is insane. For example, lezer is a parser generator( which by itself is not a trivial feat with novel
ideas like incremental computations applied to parsing) to power his mainstream project which is CodeMirror.
Like this Prosemirror too has some insane levels of engineering underneath married with thoughtful architectural decisions.
The level of depth he dives into to perfect his projects is insane. For example, lezer is a parser generator( which by itself is not a trivial feat with novel ideas like incremental computations applied to parsing) to power his mainstream project which is CodeMirror.
Like this Prosemirror too has some insane levels of engineering underneath married with thoughtful architectural decisions.
Apparently, a big fan of his works.