Similar suggestion has been here many years ago (
http://ghisler.ch/board/viewtopic.php?t=18791 ). If tc will use ms windows tabs, it is unable to have static tabs. Maybe tabs would have to be done as separate buttons or used more separate rows of tabs (as Lefteous says), but it would have to be programmed from scratch. Let author say.
You can now use colors of tabs, so differ groups of tabs as they were rows and even autocoloring according to criteria.