I am about 15 years older than you and I understand the worry. Things do take a little but longer to sink in and a little bit longer to hold in your head (I nee

I am about 15 years older than you and I understand the worry. Things do take a little but longer to sink in and a little bit longer to hold in your head (I need to be a little more intentional about remembering and I love having a notebook or random piece of paper nearby to scribble in). But I think the biggest difference comes when I care about something or not. The other day I was reading through the material for the Full ham radio license in the UK because it's about bloody time I got the Full one rather than the lower level. And because I was interested I easily recalled the next day that the impedance of coax used by hams is typically 50 ohm, television feeds typically uses 75 ohm and ladder line is 450 ohm. If you're doing something that doesn't interest you don't be surprised that your brain isn't interested either! Also, if you have a life then tiredness, worries, stress, etc. all kill your coding vibe.