This was one of my reactions, too. I've seen several friends' businesses fail, even though they had a great product, because they couldn't/wouldn't market/sell

This was one of my reactions, too. I've seen several friends' businesses fail, even though they had a great product, because they couldn't/wouldn't market/sell and saw no value in people who could and would, in a tech space. No matter how great the product, most products/services really don't sell themselves - at least without a nudge. I thought the suggestion about working on product demos and helping customers was great. I assume you would at least improve your customer communication skills, if not your sales skills. And, for introverts, this would be a great way to ease closer to that often huge line between development and sales - or just having a relationship with the customer.