Some En Route controllers in the US do work Terminal like airspace and also the other sectors including high altitude. One example is ZOA (Oakland Center) sector 40. When I retired (the airspace was supposed to go to NCT but had not when I retired.) sector 40 is 8000 feet and below and handles the following airports, Napa (KAPC) daytime tower 5 IAPs 3DPs, Santa Rosa (KSTS) daytime tower 5 IAPs 3DPs,, Gnoss (KDVO) 1 IAP, Petaluma (069) 2 IAPs, Sonoma Skypark (0Q9), Sonoma Valley Airport (0Q3), Healdsburg (HES), and a few other public and private airports. Sector 40 uses all terminal rules available to an approach control. This includes 3 mile lateral separation due to a single radar site adaptation in the mosaic radar for part of the sector. We vectored for the ILS at STS and the LOC at APC. we were fortunate to have great radio and radar coverage. it was anything but a one in one out operation. Sector 23 used to work SCK approach at night. When the B146 came to AirCal and PSA it was normal to have 4 or 5 in a radar pattern for 3 hours. Unfortunately we had to use 5 miles on that one.