I have a spring drive chrono and I don't plan on maintaining it until it actually has a problem. I'll take my chances. In my experience with all kinds of products the product is never the same after they crack the original seal with any manufacturer warrantees or service. I had Seiko fix a watch under warranty that was 10 bar rated and it ended up taking on water. They had to give me a new one. I've had new cars that when I took them in for warranty at the original dealer; more than once it came back with new problems. I like having the factory seal on my SD. At this point it's un-contaminated. 

I honestly don't feel comfortable having the seal broken for any reason; not a battery, service or warranty. I'll take my chances with the original assembly and seal. I believe the watch is the best it'll ever be mechanically. Every time you open it you invite unintended potential problems.

Discussing what might go wrong if I don't maintain it; what could go wrong? At 10 bar rated pressure seal, the oil won't be going anywhere. As far as wear, it is minimal. The gear train on the SD only moves in one direction. This reduces wear significantly. But even if over a very long period of time it does experience wear then it'll probably start to run a little faster. This wouldn't or shouldn't be a problem because the SD electromagnetic braking system will slow it down to match the quartz timing mechanism inside so that it still maintains a 1 minute a year accuracy. Lets say I get 35 years out of it before I have to service it. So what? I avoided 6 service intervals at savings of about $4800 dollars. I'll just buy a used one from someone that did maintain it or I'll spend $1500 to fix whatever happened to it and go another 35 years. 

I've heard, but not sure if this is true, that some watch collectors of old watches actually prize an old watch with an original factory seal; don't know if it is true or not. As far as durability, you may want to watch this video of the testing that Seiko went through with Cal Poly State University to see if the SD would hold up in space before they produced the Spacewalk Spring Drive. It's pretty impressive.