I don't know if you realise it or not but the point you're making is self-contradictory. If they make great margins, that's why qualcomm would want to buy them, but not why they'd want to sell and have to share it. I guess it makes sense if you're saying arduino are suckers
They're not suckers, they're just getting older and want to retire (as far as I can tell, this may actually be their motivation), so $10 million today sounds a lot better than $1 million every year for the next 15 years.
It’s unlikely that Qualcomm purchased them for their revenue or margins, which to Qualcomm’s scale are basically irrelevant.
They did say:
> you want more money now
But honestly, on HN, no one should have to explain why founders seek exits.
Just like any other founder, if the vast majority of their net worth is tied up in the company, they'd like to have an exit to take some chips off the table and diversify their investments.