Nope. Using the 1.6.1 zip file from github, somethingz's sketch no longer complains "Ooops, no BNO055 detected ...", but instead the sketch's output is usually all-zeros. Each time I press the Feather's "reset" button, there's about a 90% chance the output is all-zeros, and a 10% chance the output is good. This smells like failure to clear the I2C bus after restart, although I'm not certain. I'm too busy right now with other priorities.
I reinserted the "delay(800);" into "setup()", and now the "reset" button works reliably with the 1.6.1 zip file.
It's been about six years, but I vaguely recall that attempting to poll the BNO055 to detect when it's done booting was unreliable. Maybe there's a way but I didn't find it.
My BNO055 startup procedure (described in words rather than code):
viewtopic.php?f=25&t=108290&p=541754#p541754