No need to wait, there are metric measurements on practically everything in the grocery store, metric rulers and scales are available all over the place, metric kitchen measuring cups and spoons are in every kitchen supply store (though grandma's recipes aren't likely to be written in metrics units.) (at least I assume they're still available, all my kitchen measuring utensils were bought in the US over fifteen years ago and it's not like I actually had to look for metric ones, it was standard on everything.)
Are you under the impression that someone is going to toss you in jail for using the centimeter side of your ruler? Or do you just feel a fascist compulsion to control teaspoons of baking powder or soda other people put in their cookie dough? Feel free to pour as many millimeters of soda as you want from that 2 liter bottle into your glass. Does it offend you that the bottle of orange juice in front of me is 2.63 liters rather than an integer? Well, it's 2.7 quarts so that's not an integer either. It's 89 ounces, so that's an integer, but it's probably close enough to 2630 milliliters to be within margin of error so I don't see what you've got to complain about there.
And you're welcome to use metric units for your 4x8 sheets of plywood or 2x4 lumber as long as you don't insist on actually changing the actual wood to an integer number of centimeters.
And while we're on the subject, what business does the kilogram have being an SI base unit? And even if we accept that, what the hell is a gram? Clearly the correct use of SI prefix system dictates that a thousandth of the base unit of SI mass must be the millikilogram. Simply removing pat of the base unit's name is certainly not in compliance with the systematic use of consistent prefixes.
By the way, the physicists would like to know if you're ok with them using electron volts and light years or whether your hard line attitude requires discontinuing the use of those non-SI units as we'll.