Probably one of if not the biggest reason for changing the board software and the timing is due to Google changing how they ran sites.
Per Google:
"As we noted earlier this year, today’s the day we begin globally rolling out our mobile-friendly update. We’re boosting the ranking of mobile-friendly pages on mobile search results. Now searchers can more easily find high-quality and relevant results where text is readable without tapping or zooming, tap targets are spaced appropriately, and the page avoids unplayable content or horizontal scrolling."
For more info see here, http://googlewebmastercentral.blogs...amDG+(Official+Google+Webmaster+Central+Blog).
Per Google:
"As we noted earlier this year, today’s the day we begin globally rolling out our mobile-friendly update. We’re boosting the ranking of mobile-friendly pages on mobile search results. Now searchers can more easily find high-quality and relevant results where text is readable without tapping or zooming, tap targets are spaced appropriately, and the page avoids unplayable content or horizontal scrolling."
For more info see here, http://googlewebmastercentral.blogs...amDG+(Official+Google+Webmaster+Central+Blog).