And the TBS2000B series has it too. But might be true that it has something to do with battery power or the small size.
Yeah, not really a problem... A PSU for probes few 100s of mA is like 1sq cm.... They could have made it to be limited power like Keysight MSOX3000T so you can at least connect one current probe.
No. That is marketing decision. On software side it has their new touch GUI and it basically has many a 3000 series features, without RF part, and only 500MHz front end. Since many people don't go for 1GHz model or need SA part in a scope (which is not really good, and unlike 4 series is not correlated with time domain), if they made it really fully featured it would pretty much cannibalize sales of their own 3 series.
So they decided to make it close, but no cigar...
What we see lately is that 1000/2000 and 2000/3000 series ranges are blending together..
I don't think Keysight will ever release new 2000G series. Their 1000 series has even more capabilities than 2000A and 3000 series prices are better than they used to be...
Rigol has 5000/7000/8000 series and a 1000Z at the bottom..
Siglent has 1000/2000/5000/6000 series.
As I said, this is a unusual device. Like RTB2000, it is artificially crippled not to eat into their own 3000 series..
And like RTB2000 their market is people that need just basic scope but are willing to pay much more for a cool looks and what they think is a fancy name...