It was 9 years ago today that The Final Frontier was released. One new album in a decade and multiple 3-year tours playing only old songs? Sounds like Maiden has gone full nostalgia/cabaret act to me!
I think that is an unfair and biased assessment of their work since 2010. For The Final Frontier we had 98 shows in 2010-2011 with a set list really heavy on new post-reunion material, followed then by 100 shows looking back for the Maiden England in 2012-2014, a year off as a result of cancer, then a new album and 117 shows in 2016-2017 heavy on new material leading to the 82 shows of the Legacy of the Beast covering different eras (80s, 90s and 00s) in 2018-2019.
If anything, the number of shows played promoting new material exceeds the number of those playing older stuff.