The English-speaking media is way behind on the general sentiment regarding Bitcoin in El Salvador.
Most Salvadorans I know are enthusiastic about Bitcoin. Any opposition fizzled once those who had no experience or were confused by it saw no change to their daily lives when it became available.
The politics of El Salvador have changed pretty drastically in the past few years with the election of Nayib Bukele and the subsequent dominance of his Nuevas Ideas party in the assembly. The traditional left (FMLN) and right (ARENA) parties were completely voted out.
My guess is that Bukele's plan with Bitcoin is more political--he's inviting a new class of crypto-rich that he can play off against the influence of what remains of "las catorce familias," i.e. the remains of the entrenched oligarchy that allied itself with the neoliberals. From the point of view of political economy, the adoption of Bitcoin is a smart move in the current situation, where the USD only benefits the old power structures that control imports and services, and where a move back to the colón is no longer feasible after the decimation of the export agro-economy (coffee, sugar, corn).
An analogy I hear often from Salvadorans is that El Salvador could become a Latin American Singapore, with Nayib Bukele as a kind of Lee Kuan Yew.