A few years back, a Canadian civilian wrote an interesting article in one of our professional journals on how Canada should ditch the Leopard and buy 300 M8 AGS (Armoured Gun Systems) to equip our regular and reserve armoured regiments.
He surmised that having a 105mm gun on a TRACKED, Herc-portable platform would be a good solution for a middle power such as Canada, and revitalize our RCAC Militia units as well.
At the time, we were transitioning from Leo C1 to Leo C2, and most of us poo-poo'd the idea of ditching an MBT.
In any case, the M8 AGS - which claimed to do most of the things the MGS could not - fell by the wayside after 6 or so prototypes were built.
Enter politics: Did the 'Armor Mafia' in the USA see a light, tracked, tank gun carrier as a threat to future MBT funding? Did Canada decide to go 'all wheeled' because of it's smoother 'soft power' image?
Good questions. In any case, we have seen two interesting partial solutions. If the tracked mobility, size and 'roll out tray' power pack from the M8 AGS could be melded with the advanced FCS/vectronics from the Stryker MGS, we might see a vehicle that actually fills the void - someday.
A few years ago an American commander stated that the MGS existed only because the Stryker APC was equiped with .50 cal/40mm, and that if he had Canadian LAV IIIs with the 25mm turrets, he would not need/want the MGS. But, just one man's opinion.
In the meantime, the words of the Australian CDS from a few years back still ring true. On the eve of the announcement of the Australian purchase of American tanks by Australia, he more or less stated that Australia would have loved to have aquired a light, mobile, air-portable, modern, protected large gunned armoured vehicle, but one does not yet exist that combines the mixure of Protection, Mobility and Firepower thought necessary to save Australian lives. Hence - the tank purchase.
His interview drew amazingly few comments from serving soldiers in Canada at the time. I wonder why that was? Ever read any Orwell? "Four legs good - two legs bad!" and so on.