Too bad I can't read WSJ, so I can't verify what they're saying. However, I haven't had much luck finding overnight trains here. It used to be that many existed and were popular, but they started disappearing and now few routes still have overnight options.
"In Europe alone, several new affordable options have materialized too, running more utilitarian services (no guided excursions, just overnight schedules). In 2017, the United Kingdom’s Great Western Railway (GWR) relaunched the Night Riviera, traveling between London and Cornwall, one of England’s sunniest corners. Also in 2017, Italy’s Trenitalia-owned Thello debuted new sleeper cars with en suite showers on their Paris to Venice route. And in June 2019, Scotland’s Caledonian Sleeper will debut highly anticipated new cars with routes from London to Glasgow and Edinburgh and Highlander routes to Aberdeen, Inverness and Fort William with en suite showers, double beds and plenty of whiskeys in the bar car."
I also enjoyed "Cornwall, one of England’s sunniest corners" though it was admittedly mostly nice last time I was there. That said, might have been a useful option when I did a coastal walk last summer.
