I really do not understand why do You complain.
HESH ammunition is an outdated, very simple ammunition made to destroy lightly armored vehicles and tanks that do not have spaced, composite or explosive reactive armor, it also have some effectiveness against structures, but as I said, it is outdated, very simple and in current form can be fired only from rifled guns.
New types of 120mm and 125mm multipurpose ammunition for smoothbore guns in these callibers, are not only simple HE ammunition, these have programmable fuze, meaning that You can attack infantry behind obstacles and cover, You can program fuze in such way that projectile will penetrate building and explode inside not outside like HESH. Newer types of such ammunition like for example still being under R&D phase AMP round made in US for M1 tanks, can even perforate front turret armor of T-54/55 tank.
T-90 tank, especially in command versions or newer versions, also have AINET system, it is meant to programm fuze of HE ammunition, givving such tank an edge confronting hidden infantry, ATGM and RPG positions or even hellicopters or low and slow flying aircrafts.
So please stop complaining high end technology because You like more some old fashioned and outdated rifled gun with outdated type of ammunition.