Can we expect to see some solutions for this issue in new forum software?
Maybe using 2FA, OTP or something else?

2fa is certainly a topic in the new software. This was also discussed several times in the epochtalk subforum. here is an example:

2FA is asked many times. We might have it in Epochtalk (a new forum software) but when the new forum software will be used is still a big secret).

2-Factors Authentication

Topics	Date	written by
_______________________________________________________________________________	______________	________________________
Can bitcointalk.org get 2 factor authentication?	17/4/2013	StevenPine
Why doesn't Bitcointalk support 2FA?	14/5/2016	cryptoheadd
2FA on bitcoin talk	05/9/2017	dreamer81
Isn't it time to introduce 2FA to enhance user account security ?	24/3/2018	DdmrDdmr
Bitcointalk.org 2FA option/feature	13/11/2018	tiikol
Should there be an option of adding 2fa for forum accounts?	30/5/2019	iamsheikhadil