The top line, "Not Left. Not Right. Forward." kind of reminds me of Macron's "En Marche" ("Let's Go") that took over France in a storm, taking over the presidency AND the parliament only one year after its foundation, with very few previously known political figures in its ranks. The whole thing looked like doing management rather than politics, and offered an alternative to fed-up voters who didn't dare turn to the…
I suspect a huge part of Macron's success was his opponent. France elections have a top-2 runoff, and I wouldn't be surprised if many electors were like "I don't like Macron but I really don't want Le Pen to win". The whole "socially progressive, economically middle of the road" political coalition that would win every election on HN is extremely unpopular in the real world.
Is it? "Economically middle in the road" is somewhat around classic Social Democrat politics, a staple of European politics. The problem with the classic European Social Democrat parties is that they shot themselves in their feet by a combination of neoliberalism (e.g. German SPD post-2005/Hartz IV or British Labour) and individual scandals (corruption).