India has published a video of the BLT-72 bridgelayer based on the Soviet T-72 tank
Those stones sticking out of the road appear to be a very good way of stopping people cutting corners at an intersection....
Regarding the Leclerc... it looks like Micron is offering joint production with India for their new tank to replace the Leclerc.... so the deal would not be to replace the T-72s and T-90s with Leclercs... it would be with vapourware.
Now I can see why France would make this offer... no idea what state their next new tank programme is in and at the moment how many foreign partners are involved but going by history there will be disagreements and frustration and most countries will go it alone... so getting an order for almost 2K tanks would be a good idea for France because it would stop it from being too expensive for them to just buy for themselves.
For India I can see how they want to diversify their weapons purchases... and by 2030 they would have plenty of time to look at the T-14 and see what issues it may have by then... of course by then they might have the T-14M2, but it means they can sign up to a deal with France and just wait... just like the 5th gen fighter deal with Russia... if you don't like the way it is going or they want money for investing in the project then drop out and just buy off the shelf later on.
I am obviously biased of course, but with the Russians they can go for a combination of vehicles including tracked heavy and medium, as well as wheeled medium and wheeled light vehicles for a variety of environments and situations.... and they can use them as individual vehicles like tanks and BMPs, or they can adopt the whole family concept...