15 years ago, owning a Silvia with a diy PID was like equivalent to owning a La Marzocco Mini. Nowadays, it's crazy to think it is entry/mid-tier machine.
I think the Silvia has made a lot of nice improvements over the past 20 years. Parts are easy to find and the construction is straight forward. I also love how they kept the big switches and away from any fancy touch screen or buttons.