I created a spreadsheet of all Berserk episode releases to visualize how the past release schedule looked like.
Then I wanted to approximate just how much time it would take for Berserk to come to an end, assuming a # of total episodes and different # of episodes per year schedule.
I think the image above is self-explanatory. The "Change In Months" refers to the difference of "Final Episode" date from it to the one above it in months.
As you can see, interestingly enough, 1 episode per year change in release schedule has a drastically different effect on the final date based on the schedule. For example, for the top table, difference from 10 Ep/Year to 9 Ep/Year is about a year (13 months), when the difference from 6 Ep/Year to 5 Ep/Year is over 3 years (37 months). So, as it turns out, getting an extra episode per year, does make a significant difference for the current release schedule.
PS: From 2014 until today, we got 4.8 Ep/Year.
PPS: The tables used to have "Miura's Age" column, but it was removed, since it was in poor taste. Hence some of the comments.