I didn't compare Arjun to Russian tanks. I showed Leopard tanks destroyed in Syria.
If containerised ammunition bin with an individual shutter with blow off panels, roof mounted seats & fire extinguishing system were enough then Abrams would not deploy Trophy APS with additional block & tile armor, nor would Armata, etc be designed & developed.
The mine plough is not used everywhere & while driving all the time. Many times a tank has to drive on road also where plough won't be used. Moreover while using the plough the tank's speed is at walking speed.
30-50% is far better than ZERO % w/o APS.
Latest APS have deployed sensors in such way to fill the top conical gap which will counter top-attack munitions also. It is a logical thinking & improvement but which country will realize & do it how soon is another thing.
UAVs like Predator, Bayraktar, Reaper, etc are advantageous only in absence of air-defence. They can be easily shot down by VShoRADS, ManPADS, AAAs which can even tract & shoot smaller drones.
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Rome was not built in a day nor Merkava MK4, that's why i keeping pushing about the development of our assets & close the gap with leading nations in my posts & replies. Israel is surrounded by hostile nations & have seen continious conflicts hence they have long history of Merkava MBT with MK1 designed in 1970s. But we even after 1962, 1965, 1971 depended on imports. The then politicians are to be blamed who stalled our R&D for all 3 wings.
The enemy will not attack after waiting for us to complete our development. We have to think global, not local. We have start working on solutions & work-arounds rather than just complaining, blindly expecting & overconfidently bragging. Arjun & Tejas MK1 are examples of startup, not combat effective & economical assets as per present day standards & advancement.