Earlier quoted context omitted.
I thing that good spreadsheet application with seamless integration with web and with collaboration tooling would be interesting. Decent scripting with something Julia and some kind of build in Jupyter notebook would be exciting to use. Integrated version control where each document lives in own repo that you can shared as just link shpreadsheet:://user.myNewspreadsheet Excel is relict of old ages: slow, bug ridden,…
I think of spreadsheets as like q-tips. Apparently the one thing that the manufacturers of q-tips tell you not to do is to stick them in your orifices. Yet the number one actual use of q-tips is people cleaning gunk from their ears. People build the most insane, unmaintainable, insecure messes using spreadsheets - because they can.
The same can be said for any programming language/tool. Reminds me of this quote attributed to Doug Gwyn:
"Unix was not designed to stop you from doing stupid things, because that would also stop you from doing clever things."