yup. seen pics of iraqi tanks in dug in position with a ramp. the problem with tank defensive positions even with mobility is air attack. without air superiority, all tanks in day and night movements are sitting ducks. don't really need anti-tank tanks in a desert.
u must understand, until desert storm operation, nobody, at least those not on nato side, know how far technology had advance since vietnam war. in vietnam war and soviet agfanistan war, both superpowers with complete control of the sky also cannot win. all forgotten that the NVA and mujuhadeen fought a conflict of mobility, no set piece battle, hit and run tactic. even current taliban are not defeated by airpower. Mr Saddam himself also didnt help by being a "Hitler" style leader who not very inform in the latest technologies. but having said that, it was reported even the chinese politburo were caught out by the nintendo style warfare conducted by the coalition forces. Deng was said to be so affected by the daily footage on CNN and he knew the PLA to be totally outclass that he demand PLA to be totally modernized asap.
anti tank defense without overall air superiority not really a problem as there a way to counter. one is by local air superiority or doing the what the Egyptians did during the Yom Kippur War which they denied IDF of local air superiorty by making a massive, interlocking anti air missile belt around it armoured spearheads.
anti tank static defense is not only having own tanks in static positions, it more than that. one can have a massive minefield with AP and AV mines sow together and have part of mines connected by wires to denonate by defender, machiam claymore mine to prevent sappers from clearing the minefield. large anti tank ditches be dug to channel enemy tanks toward a kill zone etc etc.... even the cheapo concentina wire is a good anti vehicle device if the sapper know how to lay the wire.
as much as technologies are important, in the end, it the leadership, motivation and training of the troops that really make a different in the battlefield. every high tech weapons have their weakness, a tank too have it weakness, it just a matter of exploiting it. and i am no joking about arming the mat rempit with rpg7 to stop armour columns.