With the volume of equipment that the company I work for owns, and coupled to the fact that we have so many different operators, we have tended to err on the caution side as well. most of our guys run their Stihl equipment ( the non Four-mix engines ) on 25:1 "any old two stroke oil" whilst some others stick to the 50:1 ratio using the Stihl oil. We tend only to keep our two stroke power equipment for a maximum of three years, so decoking doesn't, as a general rule, become a problem, but over-heating and pot/piston damage can be (mainly, I think, because of prolonged use and lack of operator basic maintenance---dirty air filter and blocked air vents) We do have to do a decoke every now and again on equipment that has "slipped through the replacement program".
As for cheapness, with the way the company operates, my time is charged out internally against the job that the equipment comes from, plus the cost of the parts. When you keep in mind that we have considerably more buying power than the average man/woman in the street, and so we tend to be able to source the equipment at a discount in the first place, we very often get to a point when a repair isn't economical (from the companys point of veiw), but would be economical, and make perfect sense, to decoke/repair it, if it belonged to you or me.......
I like fully synthetic oil, I think it's wonderfull stuff.
I sure as Hell don't like the price though, and always use the "El-cheapo" oil on my own power tools, thats why I always go in between with the oil mix, belt and braces type of attitude..
It all comes down to personal preference in the end, as slowgrind says, "err on the generous side"