We moved our production server cluster (approximately 50 machines) over to 4os recently and the results have been great. Customers love it, the product is faster, easier to maintain, and new developers onboard quickly. We were able to get our existing team of 200 developers up to speed on Forth in about 30 days, and everything we do now is written in Forth for an OS built in Forth. For us it was a no brainer.