Basically, saudis aren’t using the tactics required to keep tanks safe. They aren’t guarding them with infantry, they are putting them in vulnerable positions, and are not leveraging terrain to reduce visibility.
Egypt need a tank between the M1 Abrams and the M60 in it’s guerrilla warfares, like ISIS in the SinaiSince the Egyptian army doesn't want to waste it’s Abrams tanks on fighting insurgents. It had no choice other than using the old M60 which had suffered a lot from ATGMs that the Insurgents in Sinai have. so a cheap T90light and more capable tank with active protection system will be much better for Egypt in it's asymmetric war.