Is he still using this time to research Spectre?
I have serious reservations about that protocol but I forgot what they were. Doh
Looks like he's on multisig & lightning now.
Thanks.

Is there any good estimation of when, in 2019, the inflation rate of XMR will become inferior to the inflation rate of BTC?
I assume you are asking about the supply rate as it's impossible to foresee the inflation based on demand (or I should re-read Milton Friedman). In that case, here is the answer:

Note the supply rate will be similar from 2019 to 2027. You can read this very interesting reddit post to get more info:
https://www.reddit.com/r/Monero/comments/512kwh/useful_for_learning_about_monero_coin_emission/Thank you for the answer but, does someone has calculated
what month of 2019 the crossing is expected to happen?
As Sprirali told you, "it's impossible to foresee the inflation based on demand" but there is a spreadsheet that rptiella made that was pretty accurate if you search this thread you may find it. IIRC Generalize This (don't remember exact spelling) had a copy.
Great link, takes forever to load.

According to that spreadsheet this looks like the day. BTC emits 1800 and XMR Emits 1,798.04.
2019-07-26
day 3891 17,510,400.00 1,800.00 12.5000 0.01028% 83.38% 1,577.14 day 1926 17,137,453.02 1,798.04 2.4973 0.01049% 92.90% 2019-07-26 3.01%
adjusted from 2019-08-10 which was tagged in the sheet.
day 3906 17,537,400.00 1,800.00 12.5000 0.010264% 83.51% 1,577.14 day 1941 17,164,165.86 1,761.35 2.4463 0.010262% 93.05% 2019-08-10 Daily Inflation crossover date 2.95%
I think XMR's emission after all the coins have been mined will actually help in adoption, encourage a bit of spending and could have a wider distribution than BTC.
Pure deflation would encourage more hoarding, less spending and could even cause the economy to stagnate.
That was the idea and there was a large debate about it when the price first became depressed as rptiella led a group that wanted the emission curve changed to increase their holdings worth and to stop the addition of a tail emission.
Monero has always put utility above profit for investors and anyone holding should be proud of that.