My, my, this thread is getting bigger and bigger.
I'm not a SIBster, but I know a lot of them! I am a member of Scandinavian Inflatable Boat Association (our chairman actually minted the term SIB) and I can tell you that some 50% of all members have inflatables just as yours and Jari's.
And they don't let the size put them off. They do take part in all our cruises, and sometimes they are the only ones to show up with the big RIBs hiding somewhere
I talked to some of the members and they said they would never change their inflatables. They are not interested in cruising in extreme weather conditions, so they don't need big RIBs. And there is nothing better than an inflatable for exploring the coastline. Some of them also regularly go to the Med and cruise in Greece, Italy and Croatia.
I enclose a picture from our cruise on the Lake Všnern. The boat in the foreground is a small RIB built by Maestral in Croatia that somehow found its way to Sweden. The boat in the background is the (probably) oldest boat in the club. A Wiking Komet from 1964! This boat has seen more water than I can ever hope to see. At this time it is cruising somewhere in Greece!
Both of these boats performed very well during the whole cruise.
So you see - no need to worry. There are many others who prefer smaller inflatables. And I'm glad for that.