This tabs vs spaces nonsense debate has gone on way too long, mostly because people cling on to terrible legacy text editors. Any modern text editor should allow you to write a simple plugin to display tabs or any combination of leading spaces as whatever indentation amount you prefer.

Projects should just pick whatever standard is most popular for their given language, and then people can tweak their editors for personal preferences.

If you encounter a lot of code on the web then you might consider writing a browser plugin.