Retirement rich, after-tax less so

Un couple a épargné 800 000$ pour la retraite et se demande s'il doit continuer à contribuer à ce rythme ou utiliser l'argent pour améliorer son style de vie actuel

My wife and I are in our mid-thirties and currently have about $800,000 in retirement accounts. They are invested in index funds (large majority) and individual stocks (minority). We have much less in the way of after-tax assets and are adding over $100,000 per year into retirement accounts (401k, profit-sharing, matches, backdoor Roth, NQDC). As you may guess, we are frugal and have always maxed out our retirement plans, IRAs, etc. This mindset comes from financial difficulties that we experienced earlier in life and the experiences of 2008-2009 that we saw our families go through. At what point is this level of contribution over the top? For example, if I let the assets ride at 10% in 100% equity investments for 25 years and never added another dime, we would have over $8m in retirement assets around age 60. But I also don't plan to retire that early as I really love what I do as an entrepreneur, so the ending balance would potentially be much higher. If we slowed or stopped the contributions into retirement accounts, we wouldn't just waste the extra money. But it would be liquid and we could invest on an after-tax basis while using some of the funds to take vacations, renovate the house, improve lifestyle thoughtfully, etc. As self-managers of the assets, we just don't have anyone to bounce this question off of, and as a long time lurker in this sub, I wanted to get your thoughts.