Again VDP speed is the issue and lack of any RAM in the TI Console a TI self imposed stupid choice built from cost of chips in the market.
TI opted for VDP instead of RAM and this is the main reason why TI Basic is SLOOOOOOOW!
Now XB has 12 of ROM ASSEMBLY LANGUAGE SUPPORT, which is why XB is FASTER THAN TI BASIC.
Why does no one get this fact?
(Yes Floating Point is slow, yes GPL is slower then Assembly, BUT NO GPL is not the problem as proven by XB using ROMs!)
I knew exactly why TI Basic was slow, the written question was rhetorical.
They were basically trying to do two things - monopolize the market and stamp out piracy by using proprietary hardware and ended up making a balls-up of the machine.
Interestingly, there's certain things TI Basic does quicker than Extended Basic. RND seems quicker in TI Basic.