I have some thoughts:

The fact that government shutdown prevented federal workers from being paid (a huge portion being the military) was a large portion of the Democrats’ leverage as public sentiment decreases the longer the shutdown persists. If the military is able to be paid, the shutdown will certainly continue as there is less pressure on either side to agree.

The military is able to operate on a limited basis with unobligated/emergency funds, but is not ‘funded’. If the pool of available money is used to fund personnel, it will certainly reduce readiness as pre-planned activities will not have funds to proceed or for emergencies. There is also certainly not available funds to repeat this multiple times.

In FY 2024 the DoD’s total budget was about $873.5 billion, and compensation for active‑duty, reserve and retired troops accounted for roughly $191.9 billion – ≈ 22 % of the total budget.

That means this move will cost about almost $16 billion per month assuming everyone including retirees are paid. The Pentagon has identified about $8 billion of unused research‑development, testing and evaluation money from the previous FY that can be redirected, but that doesn’t seem to be enough and again, a one time use.