The time to worry/ask this was before you purchased it. Unless you intend to return it due to your concerns, worrying will ultimately be fruitless.
IMO I wouldn't have bought it a) for the practical concerns around reliability and b) because of personal principle relating to how utterly abhorrent I consider Festool's handling of the faults has been.
But, if you've bought it, just enjoy it. I'm sure, for as long as it stays functional, you'll be thoroughly pleased with it!