Re: This isn't to speed up delivery to the fleet
"And now need two supply chains. So it's probably cheaper to standardise on yours, and change the design......And generating outrage by calling people stupid and/or corrupt for making perfectly sensible, but expensive, decisions is far too easy and gets far too many likes. Plus up-front cost is often a poor guide for systems that are going to be in service for 20-40 years - and the supply-chains and training pipelines that are required to support them"
That's all logical and well argued, but leaves us not that much further forward in terms of (for the most part) bloody expensive weapons, delivered late, often with fundamental flaws or capability gaps and with little commonality with likely co-combatants. During peacetime having overly expensive weapons is merely a cosmetic problem - the government just cut the number bought to control costs, payoff the deaf squaddies, and the military get fewer toys to churn up Salisbury Plain (or scare the rabbits around Spadeadam, or the fish off Aberporth, as appropriate). But as you're well aware, our governments are wakening up to the need to have bigger and more capable militaries against the possibility of a hot war, and in that case it does actually matter how quickly assets can be built, and how many their unit cost. I take on board the challenges of value-share when buying from another nation, but we've seen that effectively solved several times on big ticket defence programmes.
And generating outrage by calling people stupid and/or corrupt for making perfectly sensible, but expensive, decisions is far too easy and gets far too many likes.
I don't think I've made any accusations of corruption. My first job after graduation was working in MoD, that was a loooonnnggggg time ago, but to judge by all recent defence procurement and the outrageous size of MoD little has changed. Individually I'd hope that everybody in MoD is competent and has the best of intentions, but collectively they have been consistently associated with poor outcomes. Asserting that "it is complicated" may be correct, but that's not an explanation or a justification for those poor outcomes.