The US loophole for step up value at death is, one hopes, a loophole that will be closed one day, so a reasonable person might want to plan on it.

Why would you hope that the government takes away a benefit? SMH
Do you also think that the tax rates of 0% or 12% is a loophole because they don't pay 22% or 24%?

Anyway, just how would you plan for it?
a) As it is now, if you sell then you pay capgain tax, and if you pass it on to your kids, they don't pay that tax.
b) Or you sell now, pay the tax, and pass the remaining money to the kids.

c) If they remove the step-up basis, if you sell then you pay capgain tax, and if you pass it on to your kids, they will pay that tax. SOMEBODY will pay the tax.

How is (c) any different than (b)?

Right now the only alternatives are (a) and (b), so what planning could you do for (c)?

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::sigh:: I remember this same debate going on in Usenet, long before the internet and WWW was a thing. So that debate has been alive for 40+ years and NOTHING has been settled.

Much like the never-ending debate about taking Social Security at 70 vs. 62. ;-(

These will still be being debated online long after our grandchildren's grandchildren's grandchildren shuffle off this mortal coil.