Does anyone else use the Bucket Strategy during the accumulation phase? Looking for experiences/critique.

Hi everyone, I recently decided to move away from a standard percentage-based allocation (currently 80/20) to a Bucket Strategy for my portfolio. The target set-up would be: Bucket 1 (Emergency): 18 months of living expenses held in an aggregate bond index + 6 months in cash. Bucket 2 (Equities): Everything else in a World Index. I like the psychological safety net of knowing that even if the market craters 40% tomorrow, I can fall-back on my emergency fund (6 months cash) + the additional 18 months fixed income without me ever having to sell my equities. My concern is, while this strategy looks great on paper, are there any drawbacks i'm not considering? For those who use the Bucket Strategy or any similar variation, what are your thoughts on it? vs tradition AA? How does refilling or expanding your emergency bucket work? Looking forward to hearing your experiences!