I'll give a short answer so you can come back with more challenges on this.
Ultimately, given the challenges the defence force has, and given that we have a pretty good defence policy update but no real means the government has laid out to effectively resource that, I think we need to focus disproportionately on asymmetric capabilities, which is to say cyber and space, precisely because of the strategic depth argument that I made and precisely because it has a force multiplier effect for NATO's northern flank and, ultimately, for continental Arctic and Canadian sovereignty.
My worry is that we're having too much debate about the conventional domains because that's what we can all see and that's what many parliamentarians like because it brings money and resources into their ridings. We're not having enough of a conversation about cyber and space and the disproportionate allocation in this heavily resource-constrained environment. That's also going to have a multiplier effect for Canadian prosperity, Canadian innovation and the DIANA accelerator that Canada is hosting on behalf of NATO. There are a lot of second-order effects if we focus more on that conversation.