I converted mine to tubeless.
Made a difference, but not so much in weight oddly. The foam/tape weighed about the same as the On-One rim strip (~80g) and it took 100g of spaff and still looked dry, so really the loss is <100g per wheel.
Drilling apparently shed’s 150g per wheel.
Not sure what I’ll do to mine next, on the one hand it’s now the only bike I ride so could justifiably get some attention, on the other I don’t think it’s worth upgrading, it’s fun for what it is, chasing a lightweight build seems to be missing the point.
I reckon in a year or so I might get a Canyon Dude or similar, probably the cheapest way to shed 3kg+ and gain a bluto which would probably make more difference.