> This is true only if you invest once in your life and then hold those assets forever. But if you invest every quarter then you can do TLH on those new lots individually. And since those new lots will keep coming, your TLH will always have something to work with.

That is true, but you pay a percentage fee on all of your assets (which is growing) to be able to TLH assets you've recently added (fairly static amount over time).