Couple of quick points.So by the term "update", I assume that they still haven't made up their minds. How many updates on a single decision can one transit agency make? Seriously, GO RER was announced over 5 years ago and they still haven't even decided what trains or technology they are going to use little alone build any. I know Torontonians are use to iinertia on the transit file but this really is scandalous.
The Ford Government renamed it GO Expansion from GO RER.
Updates for all RFQs/RFPs are a normal component of Metrolinx board meetings. So it's not a big deal and actually helpful if there's is an update because sometimes months pass between when a RFQ or RFP launches and when I final winner is announced. As discussed previously, there was a January 2020 media article and discussions above about some OnCorr scope changes. Maybe there won't be an update. It's just some speculation. We'll know in a few days.
If you look at what they announced after the Wynne Liberals made the GO electrification commitment in 2014, they said almost right away that the choice of using overhead wires, batteries, or hydrogen was up to the winner of the RFP. They left it up to the consortiums bidding to decide the mix and how best to achieve with rolling stock the broad service levels currently shown on the Metrolinx website. So that clarifies the "decision" aspect. It's more nuanced than you giving the impression Metrolinx can't make a decision. The decision is part of who wins.
It's been long debated here what's better: hydrogen or catenary wires. An argument could be made they should have specified from the beginning, which is a separate argument.