Am I right in thinking that if GL and PvdA had run separately that they would've combined for significantly more than the GL/PvdA coalition? It seems like there are large numbers of people who might've have voted GL, but never PvdA, and who might've voted PvdA, but never GL. The point of combining was to try to advance Timmermans for PM, and maybe that was a reasonable goal after the 2019 Euro elections (...although in that case they should've tried it in 2021), but it doesn't seem like they actually came anywhere close, and being concerned with maintaining seat count was more reasonable.
Are GL/PvdA likely to run together at the next election? (And I realize there might be separate answers depending on whether the next election is in 1 year or 5).
Not necessarily because of the strategic voting effect. It's likely several left wing parties would've lost less to them because they would be seen as more viable options.