Anything Wrong with Transferring All Retirement Assets to the TSP?

Anything Wrong with Transferring All Retirement Assets to the TSP? I'm a former Federal employee with a modest 5 figure sum in a Traditional TSP account. I have larger sums in both trad. IRAs and 401K plans, and one Roth IRA account. I'm considering transferring all of my trad. IRA/401K assets into the trad. TSP. I also recently discovered that I can open a Roth TSP and transfer my Roth IRA money into it. The benefits I'm aware of include the G fund, and low fund fees. In addition, my understanding is that the TSP does not object to account holders having an overseas address, which I expect to have in retirement. My question is whether there is any reason not to conduct the above transfers.