People regularly report preppy's going unused for months and starting right up... and that's a $5 pen. Something as expensive as a Sonnet should be reasonably expected to at least match that performance if not out perform it in my opinion. ....
The Preppy (and the spring loaded inner cap) is actually new technology, or at least new thinking. The same new design has appeared in several pens recently (Esterbrook, Wancher are two that I know of, along with many other Platinum pens) and is much more effective at keeping nibs from drying out for a very long time versus older, traditional inner cap designs.
After all this time, there are still new tricks to be learned/invented for fountain pens. I predict that eventually many pens manufacturers will adopt this idea.
There is nothing wrong with the Sonnet, it's just not the latest/best design, like almost all other pens.
Edited by markh, 19 June 2020 - 18:14.