Well TBH the trend is to go smart even intelligent/autonomous, from SDBs to gigantic bunker busters. But aircraft payloads are not going down, it's going progressively up. For instance, our light JFT has almost same payload of B-57 of the yester years and now a rafale or eurofighter can haul massive 9 tons of ordinance.
Yes, but the Rafale and Eurofighter also weigh more and cost around 4 JFTs.