There is a way to solve the price volatility problem to the vendors.
Whenever they get paid x amount, they open a short position of x amount. When the escrow is released they close the short position. If the price of Monero has risen, the escrowed amount has risen but the short position is offsetting it. If the price of Monero has dropped, the escrowed amount of Moneros has dropped in value but the short position has risen and thus offsetting the price drop.
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I believe the original SR had such a system in-place. A seller of goods could "Lock In" an exchange rate, for a particular deal, if they were worried the rate would move against them and make the sale unprofitable. This feature was there fairly early on. Before there were several advanced markets where a trader could do this, SR made it possible for anybody to do it without needing to know what long/short even means.
Perhaps some of today's markets have incorporated this too? I wouldn't be surprised if they haven't, the price of BTC is actually considered pretty stable now. If no such hedging system exists, perhaps they should look at it again - for Monero now especially. I'd say this is one of the big reasons larger traders aren't adopting it right away, the volatility compared to BTC. If they could hedge against the price volatility, same way SR1 made it possible, it would make accepting XMR a no-brainer.
When SR was just getting started, Bitcoin's volatility was worse than Monero's today - we had moves between $1 and $20 for a while, despite this, the demand was so strong a vibrant dark-market was created. In it's wake, hundreds of new markets formed to fill it's place.
SR was way ahead of it's time, looking back on it now.. Great community vibe back then too, that was all killed, not unlike the FUD/troll attacks on the community we've seen on bitcointalk, attempting to make the place hostile and divided.. We must remember what is truly important; Crypto money provides a path to real financial freedom, freedom from central bankers and other organized financial crimes which have been legitimized. Such games are not possible when you play on our system. BTC and XMR can worth together masterfully to help the people reclaim what's rightfully ours. A fair playing field, that is all.