Hardly much change from 1942-1943 regarding building demolitions with guns
100mm HE is weaker than 15cm, AP will pass through, HEAT will make big bang but very limited structural damage. 90mm, ditto. 105mm is a tad better with HEP rounds, the same for 120mm L11 and derivatives. However say 120mm HEAT is again significantly weaker against structures more stable than a wooden shack.
The real winner would be 165mm gun from CEV or 160mm or 240mm mortar but even there I'd doubt its abilities to bring down most buildings that I'd put into "stone building" section of SP maps with one or two shots. Oh, and then there's thermobarics for sure - they do put out big pressure, but even with that video of RPO Shmel blowing off the upper half of a small brick house I'd like to see the results of warhead impacting the target, not of warhead being placed inside
Other than that, I don't see many advancements since 1942-1943 in this field. Artillery concentrated rather on range and accuracy, its HE loads remaining on the same level as WWII (generally), improvements re. lethality were aimed at ICM and better frag patterns. Mortars generally the same. Tank guns fixed on penetration mostly, there the leaps qere great, but at the expense of HE rounds usually.
There is plethora of means designed to get inside a building - various breaching rounds etc. - but they do leave the building standing.
Again, it's the same as "stone" and "wooden" bridge - forget about "stones" and "wood" and view the buildings as "heavy" and "light" - in my Petrzalka map, I am using stone buildings primarily for old Bratislava downtown with large stone or heavy brick buildings and for newe ceoncrete block of flats, wooden buildings do represent ordinary family houses and large industrial halls, usually with light construction (getting the lighter the newer they are).