https://www.flightglobal.com/opinion/the-usa-should-invest-in-electric-regional-aircraft-not-high-speed-rail/144576.article Electric regional flights could disrupt projects like HFR. They certainly could provide the solution to flight shaming without the need for a mode shift.

https://www-lapresse-ca.translate.goog/affaires/2021-11-27/tgv-entre-montreal-et-toronto/un-trajet-des-plus-prometteurs.php?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=nui Another article comparing the merits of high speed rail and hfr.