It suggests a lack of focus, and gives users a reason to not trust their products. Why should I adopt service n when it's probably going to be shut down in 12-18 months, after the launch of service n+1?
You shouldn't, because you're a member of the early majority, late majority, or laggards, in Crossing the Chasm terms. Innovators and early adopters are more comfortable trying out a startup's offering that might be imperfect or might fail.
Most people are conservative like you. Your sheer numbers are why crossing the chasm is so important for the long-term survival of a new offering.
I love discovering and trying out innovative new products, and have made it a large part of what I do professionally.
However, some offerings I take more seriously than others.
With Google, if it's not search, data or ad related (i.e. the stuff that makes them money), it's generally the case it's not going to be around long-term.
Most people are conservative like you. Your sheer numbers are why crossing the chasm is so important for the long-term survival of a new offering.