I have a dish full of plastic Janome bobbins from new to back 20+ years.
Experience taught me early on to slow the winder down if loading nylon/invisible thread, because it stretches it could go on so tight as to actually explode the bobbin.
I go through mine about once a year and pitch the ones that look like they've given their lifetime worth of service.
That said, I've had zero problems with bobbin/8900. I don't think I've done any fmq though.