I don’t want to join a proprietary service, but I want to be able to communicate with people who chose to join it.
Tabs let you define how big you want each indent to be…except when they don't. Many common environments have a hardcoded tab size of 8, which is insanely big for using it for indentation.
I never understood how concatenative programmers can hold the current state of the stack in their head and never get confused about what is where, especially when changing complex code.
They are not free because they deprive you of your privacy.