Everyone has very short memories, history is normally a very good way to predict the future.
Trent210, to a lesser extent that is exactly what seemed to be happening in the period when recruitment levels were low (which to me is actually situation normal) in previous years.
Between 2008 until 2014 and to an extent between 2000 until 2007, there was certainly a trend where the mainstream airlines and the low cost were recruiting either low hour integrated via some form of SSTR scheme, or those with 500 hours time on jet preferably Airbus or Boeing. Alot of instructors and turboprops pilots in those times were stuck where they were unable to progress in that time. So Trent210 it is very feasible we could see the past practices return. While a cadet may entail extra training requirements in year 1 (if a SSTR scheme then the cost is partly or fully mitigated), by year two the lower salary starts to offer a saving.
The last 3 years were exceptional recruitment levels and the first time modular has seen an even keel in airline recruitment. The last 2 years did see BA take low hour modular via a SSTR scheme,absolutely unheard of in the previous 15 years.
However Look at LPJ, the Eaglejet Adverts for pay to fly have reappeared with a resurgence in recent weeks.