I've never found my StingRay heavy, and heavier instruments sound better and have more sustain, anyway. My StingRay is still lighter than a Les Paul. The modern fetish for lightweight basses confuses me. EBMM's decision to move to lighter wood and a lower mass bridge is, all things being equal otherwise, detrimental to "tone".
I’m as big a Stingray fan as there is. I had to sell the last SR5 in order to buy the Mike Lull M5V bass that is my main bass. However, I will get another SR5 in the near future.
The weight has never bothered me, but I can’t go along with the heavier-means-more sustain idea. I used to think that. But both of my Lulls (M5V and P5) weigh in well under 8 lbs. And both Lulls have the most sustain of any bass I’ve ever played, save the Alembic Series Two I used to have. Definitely more than the SR5s and all the Fenders I’ve ever owned.
Having said that, extremely long sustain isn’t a metric I use a lot when evaluating basses. And a little less sustain than my Lulls will never ever stop me from owning a Stingray.

