I'll second this and add that you're probably sending out fewer but more targeted applications as you progress further in your career.
Eh. Maybe but I still have to interview with dozens of companies because you need competing offers, warm ups to calibrate performance, and so forth.
I don’t expect any less than 10 onsites for any job search regardless of tenure.
Leetcode and system design prep take up the overwhelming majority of job search time. (Hundreds of hours - months of nights and weekends) Then the interviews themselves come second. I did something close to 200 hours of interviewing for my last job search (including some dozen onsites which were all 5-6+ hours). This is hugely time consuming… spending a half time spamming some websites is hardly that difficult in comparison.
And yes, I had to finally take time off of work to accomplish this. I usually take PTO to do this or just quit my job outright or get severance to help as well. (All the above sometimes)