There were quite a few models where the RAM wasn't upgradable - I believe they were soldered directly to the main board. Is this the case for this revision? I c

There were quite a few models where the RAM wasn't upgradable - I believe they were soldered directly to the main board. Is this the case for this revision? I can't tell! Seriously, I used to be able to tell from product spec sheets, but Wikipedia also used to have model lists for each major product line with detailed specs. Wikipedia doesn't do this any more? Not even as part of Wikidata?