Personally, that's my take on Delta-ware. I mean, if you can find a shadow-clinic(as mention, Chiba sounds like a good bet), and get the nuyen and everything to get said delta-ware, then...by all means, you've
earned it. The thing is, the cost. If you are getting Delta-ware...I don't think you'd be going for Delta grade Wired Reflexes 1. If you're going Delta, you're probably going for the 3, which cost just half a point of Essence above the regular 1. This is...1,000,000 nuyen. If you want anything else with that, your ''bar tab'' could very well be, after surgery, palm-greasing, and whatnot, well over a million and a half nuyen. At that point, most sane runners would indeed just retire on that money. 1,500,000 nuyen can keep someone going in relative comfort-not Luxury, but at least High with a few other tidbits...for over 10 years. With the other 500,000 you could have long gotten yourself a new SIN, a new hometown, and could well have erased the crap keeping you int he shadows in the first place, and it might not even cost that much. I am pretty sure with that much dough, you could retire and start a new, sane life.

Even Delta grade wired 2 will run you 320,000 nuyen, not including the extra costs that might come with that. Now, 320,000 isn't enough to retire on, but it can keep you in relative high-lifestyle comfort for three years without having to run.
But again, it's up to the player-if they want to spend a million and a half on cyber instead of living a straight life...then the campaign just goes on longer.

I won't try to stop them. As a GM, I believe in letting them at least attempt about anything as long as it doesn't involve trying to detonate the earth's core.