I wanted to follow the 4% rule, but found it to be a bit too limiting, as I want to have a house early in ER, dive, and hopefully travel, while my health is presumably better. I don't expect to have a constant WR throughout the remainder of my life, especially if it lasts for 20-30+ years or so. Bernicke's 'rule' fit my mom's spending profile, almost to a T, up until the end. If she hadn't had a good friend who helped her with meds, shopping, and doctor's visits (and hadn't had dementia and refused paid help), the last 3 years would have been more expensive.
I plan to 'pre-spend' from age 55 (next year) to age 70 or 75, with a starting WR of 4.3-4.7%. Then, when SS kicks in, if the portfolio is lower than starting, then I'll adjust the spending to account for SS and the lowered 'new' starting value, a la VPW; if it's even, or up, then SS will give the spending a boost. While there's some risk, even if the portfolio drops by 50%, that with SS, and moving from the house to a condo (which is my mid-term plan, regardless of assets) should be more than enough to offset the loss.