That's the problem in the comparison: America is far different country in its history, identity and beliefs, particularly on the idea of a right to gun possession (beyond the ping-ponged 2nd Amendment issues) and self defense. If one believes a 2012 Congressional Research Service report (from a 2009 study based on U.S. Department of Justice estimates), there were 310 million guns in the U.S. Taking into consideration lost, stolen or inoperable guns, that estimate still says much about the interest in guns (meaning year after year, manufacturers aren't producing guns for no reason), so one could say guns are not going anywhere anytime soon.
Although the General Social Survey's chart of U.S. households with guns listed the last highest point at 54% in 1977, as of 2017, that number only dropped to roughly 40%. The joined Gallup data has the last highest household ownership at 48% between 1991-94, with the 2017 numbers at 42%. If you use the GSS's data going back to 1977, that's a span of 40 years. In that time in the U.S., despite horrors such as the attempted assassination of Reagan, attempted assassination of Gabby Giffords, numerous mass shootings (terrorism, school, work-related, random targets, race-related, murder-suicides, etc.), celebrity/famous individuals murdered (e.g., John Lennon, Dorothy Stratten, Rebecca Schaeffer, Gianni Versace, et al) and other gun-related crimes (whether the firearm was legal or illegal), nearly half of the nation still has guns in the home. That is a rather large statement, and shines a light on how no amount of gun-related deaths sends gun ownership taking a dive on a genuinely notable level over four decades.
Additionally, of the six federal laws (acts) passed on guns since 1986, the most recent--2005's Protection of Lawful Commerce in Arms Act was--as the title suggests--designed to protect gun manufacturers from being held responsible for crimes committed with their products. Many a politician promised to repeal the act, but it still stands. That too, is a large statement.
So, that goes back to the "why" of gun ownership in the U.S.--truly an American cultural/philosophical issue, and how a sweeping ban of all firearms would likely face continued resistance beyond the NRA and its elected shills like nothing seen before.
I only see Americans only moving to alternatives in great numbers if the option was on some sci-fi-esque level like the Star Trek Phaser, something not requiring darts, close contact or lethal force, but was a proven defense. That said, I don't see that kind of energy beam technology on the commercial horizon, so....
Even if it existed now, I see many still refusing to give up guns, all in the name of their oft-stated 2nd Amendment, freedom and the belief in / resentment of the government trying to disarm the repeated "law abiding citizens".
