Tentacle Snr who is a GS and does 150k BIS in GF every year

Having GF meant having a near 100% chance of having a premium seat available for last minute purchase on nearly any route which is of high value
He frequently has less than 4 hours of notice of when he has to travel INTL and GF is always cheaper than private jet
He is thinking of using LH/SQ/NH a lot more but is slightly worried about losing GS