Getting tabs to look right depends heavily on the configuration/choices of all the software the source code might be displayed or printed by. If you have a restricted set of such software and find that’s not a practical problem for you, that’s great – go for it if you see value. But, be aware that when a line is indented with tabs, then continued on subsequent lines where you want indentation based on the position of an opening parenthesis, to line up quotes etc. – you’ll be mixing tabs and spaces in a way that’s visually impossible to verify the correctness of (unless your editor shows tabs differently). Countering that, using arrow keys to cross tabs, or delete, can be faster but also more confusing and frustrating. It’s rare for different people using different tab widths to work cleanly on the same code, which is perhaps the main promise of tabs. Personally, I use spaces.