The Rivelia is De'Longhi's answer to the bean-switching problem: swappable hoppers let you flip between regular and decaf without dumping grounds or cross-contaminating flavors, all in a compact footprint that fits tighter counters. The side-mounted water tank is smaller than bulkier rivals and refills run more frequent, and cold foam requires buying the Eletta's cold brew container separately (it works, but factor the extra cost). Buy it if you drink both caffeinated and decaf espresso daily and counter space is tight. Skip it if you need cold drinks out of the box or want years of durability reports before committing.
This is the espresso machine equivalent of learning stick shift: punishing at first, deeply rewarding once you crack it, and built to outlive your kitchen counters. The real trade-off isn't the single boiler or the missing PID, it's the learning curve itself: dialing in grind, managing temperature surfing, and mastering puck prep take weeks of wasted beans and forum-diving before you pull a shot worth bragging about. Once you do, you've got a machine that's been running since the '90s in some kitchens, fixable with cheap parts and a screwdriver, and moddable into whatever you need. Buy this if you enjoy understanding your tools and have patience for the apprenticeship. Skip it if you want espresso tomorrow morning without reading a manual.