must be depressing being on the team of elves who fix last year's broken gifts.
Hm - I am more than happy if The Wichtelmänner deliver me that stable OS (10.9.5), stopping me from running an immature system and going through incremental upgrades, having each time to setup essential tweaks again (enabling TRIM, stop lidwake + hibernate, not leave ".xxx"-files on windows shares, etc.).
Happy to come back when 10.10.5 comes then ...