Clearly, Echo doesn't make junk chainsaws. However, performance wise they are not modern, no matter how you want measure that.
"no matter how you want to measure that"
Well, I measure performance in several ways, and not all ways are of equal importance.
Let me name a few of them ( in no particular order )...
Performance as in power to weight? Sure, power is important, but lugging around an extra pound and a half all day, for no particular reason.. ?? Increased user fatigue for no reason.
Speed through a cut.. Sure, faster is nicer, but just be sure that the comparison is between two saws with identical displacement, identical gearing, and identical chains. Price matters in that contest too...What is 1 second quicker for a cut through a 12 inch log worth? How many hours of cutting, while saving a second a cut, would it take to make up the price difference ( whatever that might be)? If you save 1 &1/2 seconds per cut.. you saved 90 seconds per 60 cuts ( at 10 seconds per cut ). That works out to about 37 cents, at $15.00 an hour. And that is going to be a long time before that 500i nakes financial sense.
Saw feel.. can you get used to it's power curve, or are you fixed in your ways? I took down a tree with a friend of mine who is a die hard Stihl owner. We flipped for it, and he landed up on the saw ( Echo 590. (mine)), and I was on the rope / winch / ATV. He kept bogging the saw.. because he was used to the low end grunt of a 362 Stihl.. He couldn't wrap his head around letting the Ec ho rev up and cut. He wanted to dog in and make 'er grunt..
I've got a Stihl 362, an 038 AV, an Echo 590, 2 Echo 355Ts , an Echo 800 P, a Husky 455, an antique Homelight, and two "Chinesium" knock offs. I love them all, but I also respect that they are all different, excel at some jobs, suck at other jobs, and each one has a different personality... Even the ones that are supposedly identical.
If you like it, run it! At the end of the day, you are the only one who has to be happy with the saw you're running. Nobody else. And, if you're spoiling yourself with a saw that you don't really need, oh well.. so be it.