Would tanks made with the same material and technology as mechs made mechs obsolete?
Nope.
Next question.
>>15012060
A tank with thrusters, legs, and arms is basically a mech.
>>15012099
What if just thrusters?
>>15012105
That amphibious thing looks like it should be on Thunderbirds.
>>15012105
Then it wouldn't be using all the technology a mech had.