Likewise for technical diving. If it fails, you end the dive, knowing you have enough to get to the next gas. If the SPG on the stage fails, no biggie, you know you have planned ample deco gas for the planned deco, and your team also has extra deco gas resources for you in case of lost deco gas.You're not in deco, you know your gas and if things go haywire (as said, increasingly unlikely) you're ending the dive so I personally don't see any risk at all for recreational diving.