As I understand it, some of the physical layer options for Ethernet include:\
10BASE5 (now considered obsolete): a single length of thick coaxial cable.
10BASE2: thin coaxial cable, of which multiple lengths can be connected by T connectors.
10BASE-T: twisted pair, of which multiple segments can be connected by hubs or switches.
Is there a reason why 'twisted pair instead of thin coaxial' has to go with 'connect segments with hubs instead of T connectors'? Something about the electrical properties of twisted pair that make it unsuitable for the simpler way to connect segments? Or is it just considered more convenient to use hubs or switches for other reasons?