In 500 years, I'll be dead. I guess it really wouldn't matter. I just find Reagan's ignorance about things like that overwhelming. The same as I found Jimmy Carter to be utterly unfit to be President. I think though, by the time Reagn was President, the people were kidding themselves if they thought the Soviets wouldn't collapse soon.
That's only clear in retrospect. The Soviets had serious problems, but they also had the ability to force their citizens to endure hardship in order to continue their relentless military buildup and foreign aggression. The democratic nations of the west lacked this ability.
When Reagan took office, Soviet power was at its peak in the world. The Soviets were arguably ahead of the US militarily, all things considered. They were certainly ahead in conventional arms in Europe, forcing NATO to rely on the first use of nuclear weapons as a deterrent to Soviet aggression. They had recently invaded Afghanistan and were threatening Poland, on top of all the geopolitical gains they had made in the latter half of the 1970s using surrogates like the Cubans.
It was recognized that their economy was performing poorly, but this was mitigated at the time by the fact that they could force their people to endure hardship in order to devote a much higher percentage of their economic output toward the military than the US could ever get away with.
Reagan helped hasten their collapse by forcing them into an arms race that they couldn't afford. From the mid-1960s, Soviet arms buildups had not been met by a western response, so there was little in the way of their strategic advances, but Reagan hit them where they were weakest by forcing them to strain their faltering economy further in order to keep up, rather than helping them in their weakest areas, as Nixon did under detente, and as the Democrats did and proposed to do.
It is facetious to then apply an inevitability to collapse of the Soviet Union in order to negate Reagan's contribution. Reagan doesn't deserve the sole credit for their collapse, but he certainly helped.