I guess the term "cash" is a bit nebulous to me. I define cash as any easy to obtain funds that costs little or nothing to convert and can be done in a day or two. IOW, the conversion process isn't cumbered with sales charges, paper losses, etc. So, for me, that would include savings accounts (of which I have virtually none), checking accounts in which I keep $10K to $20K since monthly expenses could chew that up in 4 to 5 months. I also have significant I-bonds which are turned into cash at a bank if they haven't changed the rules - so far, I've let these ride as they are a very useful vehicle for "titrating" ones taxes. If you have $20K and $10K of it come from proceeds, you can take the money out and only pay taxes on $10K. I also have a stable value fund and stock fund within my 401(k) which can e-transfer cash to my bank in less than 48 hours. Admittedly these transaction have tax consequences, but the "cash" is available very quickly.
Ready cash (in the wallet, bank accts., etc.) are minimal (I mentioned as much as $20k, but I have access to 10 times that with a phone call or e-transfer).
So when I retired, and shortly after, my cash was about the same. I went through the "easy" cash pretty quickly as I paid the taxes on Roth conversions. Now, I get "cash" (e.g., in the check book) as I need it from my 401(k).
Even Roths could be considered cash since the conversion to cash is quick and is tax free.
But, for the most part, I just don't keep much unproductive cash around - just what I need to never worry about writing a good sized check when I need to. YMMV.