With the advent of the museum this needs to be addressed. Most players have figured out that negative effects on invading aircraft are by far the most useful museum pieces to have after the loot ones. The luckiest among us will find boosts that increase these negative effects up to 80%. Yet for some reason Nexon insists on keeping aircraft training at an abominably slow rate that doesn't match the rest of our army in the slightest.
It's like their intention for late game raiding is to just do two to four big all-out attacks per day with the help of instant retrain, then twiddle our thumbs the rest of the time. Given the lengthy time of upgrades in later ages this is perfectly viable, assuming one isn't trying to gather NTG's for war, but not particularly fun or engaging.
While I'm sure some impatient folks will crown their planes, I'm sure many just log out and engage with a whole world of other entertainment options out there. This refusal to address the obscene aircraft times seems counter-intuitive for a game that wants our money and attention in a very crowded market. My planes cost close to 1000 oil apiece, costing 2+ hours of time just to get them back serves no one's purposes. Make it a separate blessing, fold it into the training blessing. Do something beyond saying ''You can use a power plant that only comes around once or twice a year to reduce those times!''